Philips ISP1301 User's Manual
Contents
1. E E E E E E mm Sw e T C T p o USB 0 110028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 17 of 18 TOR ALE 3 4 3X2 6 8X2 20X2 ACK E OUT E IN E Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 10 References 15 1301 USB On The Go Transceiver datasheet Universal Serial Bus Specification Rev 2 0 On The Go Supplement to the USB 2 0 Specification Rev 1 0 ISP1301 Errata 0 110028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 18 of 182. 10028 15 1301 USB OTG Transceiver Eval Kit User s Guide February 2003 Semiconductors User s Guide Rev 1 0 Revision History Version Date Descriptions Author 1 0 Feb 2003 First release David Wang We welcome your feedback Send it to wired support philips com Philips Semiconductors Asia Product Innovation Centre Visit www semiconductors philips com buses usb or www flexiusb com PHILIPS Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide This is a legal agreement between you either an individual or an entity and Philips Semiconductors By accepting this product you indicate your agreement to the disclaimer specified as follows DISCLAIMER PRODUCT IS DEEMED ACCEPTED BY RECIPIENT THE PRODUCT IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW PHILIPS SEMICONDUCTORS FURTHER DISCLAIMS ALL WARRANTIES INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANT ABILITY FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT THE ENTIRE RISK ARISING OUT OF THE USE OR PERFORMANCE OF THE PRODUCT AND DOCUMENTATION REMAINS WITH THE RECIPIENT TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW IN NO EVENT SHALL PHILIPS SEMICONDUCTORS OR ITS SUPPLIERS BE LIABLE FOR ANY CONSEQUENTIAL INCIDENTAL DIRECT INDIRECT SPECIAL PUNITIVE OR OTHER DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BU
3. T8698 TOS NITOS XNA SOLOHFL OIA Usd NAL HIN Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 9 Bill of Materials Table 9 1 BOM of the 15 1301 evaluation board Part Type Quantity Designat Footprint 0805 E 2OnF 105 Ke Ne s 0 1 uF 80 20 C5 CIO CI9 C21 C22 0805 C23 C24 C26 C28 uF B0 20 7 Q2 7uFI V RB 1 2 OuFI6V 5 C20 07 T _______ 8 22 ReRe 3 2 6 0805 805 95 0 10K R6 R7 R8 R9 RIO RI5 RI7 0805 Ring NOR WMHrOSCHAER 7 U e cns 2 74HCTOA a 8584 DC CONTROLLER U4 DIP20 125 P MOSFET POWER 508 MOS ZVN4206 N MOSFET Q2 Q3 TO92 4 LMII17DT33 3 3V NEN TO252 TZSNEDDIOD Di 0 1 S EDI LED2 Thru hole ru hole ru hole JP3 JP4 Thru hol ru hole ru hole y 2 5 Thru hole 3 8 Thru hole 13 Thru hole PI JP2 JP5 Thru hole J7 TE SW JI J4 9 REGU S L SPK L P SW PB M R R R R R R IN N PHONEJACK STEREO OWER JACK USB A RECEPTACLE LA
4. N HEADER N AUDIO INTERFACE L R SPEAKER LINE IN MIC PRE AMP OUT P P x 2 IA a lt A QN z N LM a PCF8584 lC BUS ISA 9 CONTROLLER N 2 E JL 3 I N DP DM ID Vays N ISP1301 OTG TRANSCEIVER ME A N gt mini AB Receptacle WoL HC DC andoTGcorE Se FPGA LOGIC INTERFACE N INTERFACE CONNECTOR N to the ISP1362 FPGA or CORE INTERFACE OE VP VM RCV N Phone FPGA N SPEED SUSPEND RESET Von we N 7 N ext gt Figure 6 1 Block diagram of the 15 1301 evaluation board 6 2 Functional description A brief description of each function module is given in the following sections 6 2 1 PCF8584 l C bus controller This block provides functions of the l C bus to the 8 bit parallel bus converter It can connect to the Philips ISP1362 or 15 1161 ISA interface board or any other generic 8 bit microprocessor interface through a 40 wire IDE cable The or other microprocessor can service the interrupt from the 15 1301 and access the registers of the ISP1301 through this interface 6 2 2 PC parallel to converter This interface provides an alternative method to access the 15 1301 interface through the PC The PC needs to emulate software master to access the ISP1301 slave 6 2 3 HC DC and OTG core logic interface connector Thi
5. Turbo C 3 0 UMIOO28 1 Koninklijke Philips Electronics N V 2003 rights reserved User s Guide Rev l 0 February 2003 5 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 3 Configurations and settings 3 l Power requirements By default the 15 1301 board is powered by 5 0 V power supply through the DC jack J12 inner The 5 0 V power can also be supplied from the USB Type B connector J4 However when J4 is connected to a USB port on the PC leave the USB mini AB connector J9 unconnected If an external microprocessor is used to control the controller chip PCF8584 U4 the 5 0 V power can also be supplied from pin 16 and pin 18 of the microprocessor connector 13 When the 5 0 V power is correctly applied to the board LED2 green will turn ON Table 3 1 5 0 V power selection Jumper Descriptions JP6 Short 5 and 2 5V 5 0 V from the microprocessor interface 16 or 18 of J13 Short 3 VBUS and 4 5V 5 0 V from the line of the USB connector pin of J4 Short 5 EXT5V and 6 5V 5 0 V from the DC jack JI2 inner default The power supply V pin for the 1 1301 can be provided either from the onboard 3 3 V source or from the OTG Controller interface pin 2 of J3 Similarly the power supply for the V called V in the ISPI301 datasheet pin of the ISPI301 be provided either from the o
6. device and only the mini AB connector J5 will be used Host Controller is connected to the 0 the USB port functions as a host and only the Type A connector will be used e Device Controller is connected to the 15 1301 the USB port functions as a device and only the Type B connector 4 will be used You can use all the three ports at the same time If you have a system that consists of a USB host port and a separate device port then the host port can be connected to 4 and the device port can be connected to JI using the standard USB cable In such a case the ISP1301 provides only OTG functions to the system the transceiver function of the ISP1301 is not used 3 4 Audio interface ISP1301 evaluation board has an interface to support an analog audio carkit application Connect e The audio carkit to the mini AB connector 9 on the board e The audio input line signal to the SPK LINE IN socket 6 on the board e The audio output line signalto the MIC LINE OUT socket J7 on the board 3 5 Reset For a hardware reset to the 01 press the manual reset switch SW The reset pulse active LOW can also come from the OTG Controller interface pin 8 of J3 4 Location of major components Figure 4 1 shows the location of major components on the evaluation board 0 110028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003
7. shows the pin assignment for J13 Note We use a 20 x 2 header to make it compatible with the Philips ISP1362 and ISPI161x ISA interface boards Table 7 2 8 bit microprocessor interface 20 2 header J13 pin assignment Pin no Pin name Pin no Pin name Pinno Pin name Pinno Pin name GND 11 21 D7 3l D2 2 n C 12 133 V 22 INT2 32 n C 3 n c 13 n C 23 D6 33 DI 4 CHRG EN 14 n C 24 INTI 34 WR 5 n C 15 25 D5 35 DO 6 n C l6 5 0 V 26 n C 36 RD N 7 n C 17 n C 27 D4 37 n C 8 n C 18 5 0 28 38 CS N 9 n C 19 GND 29 D3 39 AO 10 33 20 n C 30 n C 40 n C 1 n c Denotes no connection Note An external OTG Controller system can use the CHRG EN signal to enable or disable 5 0 V from the Vus line of the mini AB connector to pin 2 of J2 This is useful when an analog audio carkit is attached and the carkit can charge the external battery 7 3 USB OTG Controller interface 8 x 2 header J8 and J3 pin assignment Header connectors 8 and 3 are used to connect the ISPI301 to the OTG Controller core J8 includes the USB Serial Interface Engine SIE signals DAT VP SEO VM RCV and OE TP INT signals SDA SCL and INT J3 also includes other signals that may be used by selected OTG Controller UMIO028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev
8. 0 February 2003 13 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide Table 7 3 OTG Controller interface J8 pin assignment Pin no Pin name Pin no Pin name GND 9 GND 2 Vo 10 OE_TP_INT_N 3 GND GND 4 INT N 12 DAT_VP 5 GND 13 GND 6 SDA 14 SEO_VM 7 GND 15 GND 8 SCL 16 RCV Table 7 4 OTG Controller interface J3 pin assignment Pin no Pin name Pin no Pin name GND 9 GND 2 Vaar 10 SPEED 3 GND GND 4 n C 12 SUSPEND 5 GND 13 GND 6 ADR 14 VM 7 GND 15 GND 8 RESET N 16 VP 8 Schematics of the evaluation board 0 110028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 14 of 18 jo yous G3VOS NOLLV YTV AH 101451 N9 SZLS qns HH x 2 amo 910 089 cl I dA 01 INA 6 N INI dL OT 8 KINSdS OS WA 1314518 A9 IRL T 49022 907 ANIT OIINDIOVIHNOHd NOT I ANIT MdS OAUALS 2IOVIEINOHd YAT A NIT ASTAROT TIOVIddOSgH H 950 TIVLSNI LON Spp Jo OS OTA 101451 N 18548 858 IOS ELOZTTITWT TO FA EN HE ER A HN Ic 4901 61 0 ASt Attdn SOLOHPL
9. 7 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide J6 J7 J10 TN JP3 JP4 J11 J12 JP5 JP2 J J9 J8 J3 ut a swt J13 94 U4 15 1301 EVALUATION BOARD REV 1 0 Figure 4 1 Location of major components 5 Test program 1301 EXE 5 1 Introduction A DOS test program 1301 is provided to help you verify the functions of the 5 1301 chip The program uses the PC parallel port to access the ISPI301 registers through the interface The program simulates software master at the hardware abstraction layer HAL The test program can do the following UMIO0028 1 User s Guide Set the slave address for the ISP1301 based on the hardware setting of the ADR pin Reset all registers to their default values Display the current value of all registers on your PC screen Write any value to a writable register Set the mode of operation of the ISP1301 such as USB function and suspend mode transparent mode transparent general purpose buffer mode and global power down mode Enable or disable the charge pump of the ISP1301 Koninklijke Philips Electronics N V 2003 All rights reserved Rev 0 February 2003 8 of 18 Philips
10. SINESS PROFITS BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION OR OTHER PECUNIARY LOSS ARISING OUT OF THIS AGREEMENT OR THE USE OF OR INABILITY TO USE THE PRODUCT EVEN IF PHILIPS SEMICONDUCTORS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES 0 110028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 2 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide CONTENTS l 2 25555 5 2 SYSTEM REQUIREMENT SS wisssss ccsecesscccsnsscsssccscncccneseesosensnassassvooscsensneseen sodescsscnssstessssosnaesnnnseeseesesavensss 5 3 CONFIGURATIONS AND SETTING ccccsssssssccssccccssssccsccccccccessscccsccccececssssccseccccscccssssccsscsssecss 6 3 1 POWER REQUIREMENTS rotos coit RR EE OR RR RR NN RR 6 3 2 l C MASTER SELECTION 3 3 USB INTERFACE ONENE TE 3 4 AUDIO 3 5 MSN ML E T IEEE 5 TEST PROGRAM 130 EXE 8 PEEM I rte ejepe E 5 2 RUNNING THE TEST PROGRAM ctcetis toss tents teta intor nca atta 5 3 5 O O EE 5 3 1 Choose 12 slave address for ISP1301 5 3 2 Reset a
11. Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 5 2 Running the test program If your PC boots to pure DOS run the test program on the command line If your PC boots to Microsoft Windows 98 open an MS DOS window and run the test program It is recommended that you boot the PC to pure DOS To run the test program type 1301 and press the Enter key at the command prompt Note In the BIOS setting of the PC the I O address for the onboard parallel port is 378H 5 3 Using menus After the program has been launched the main menu will appear on the screen See Figure 5 1 2 ef xl ISP1301 OTG Xcvr Test Program 9 2002 Philips Semiconductors APIC Main Menu Choose I2C slave address for ISP1301 Reset all registers List all registers Read write register Select Mode of Operation Enable Disable charge pump 1 2 3 4 5 6 Esc exit Select Figure 5 1 Test program main menu In the main menu screen selecting any item 1 6 will perform the desired action If you wish to exit the program press the Esc key The following sections describe the menu items 5 3 1 Choose 2 slave address for ISP 1301 The program will prompt you to enter your choice based on the hardware setting of the ADR pin If ADR is HIGH select The slave address for the ISP1301 will become 0x5A If ADR is LOW select 0 The slave address for the ISP1301 will become 0x58 Make sure that choice
12. d other analog components to fully support OTG functionality The ISP1301 is ideal for use in portable electronics devices such as mobile phones personal digital assistants PDAs digital still cameras and digital audio players The ISP1301 acts as a physical layer to interface with any USB OTG Controller The ISP1301 evaluation board is designed to evaluate the functions of the ISP1301 chip The main components the board are the ISP1301 in HVQFN24 package master USB mini AB connector analog audio interface and USB OTG controller interface The operation mode of the ISPI301 can be configured through the interface The OTG status and control registers in the 5 301 can also be accessed through the interface To verify the functions of the 15 1301 by using the DOS test program that is provided with the evaluation kit connect the 5 1301 evaluation board to the parallel port of a PC To fully verify the functions of the 15 1301 a USB OTG controller is used to connect to the ISPI301 board through the defined interface connector 213 Die 3 hn m 3 Figure 1 1 ISP1301 evaluation board PCB layout 2 System requirements An x86 PC with DB 25 parallel port is required The test program runs on DOS or the command line in Microsoft Windows 98 In the BIOS setting select port address 378H for the onboard parallel port The test program is compiled using
13. ll registers M 5 3 3 rao JI P M 5 3 4 Read Write register 5 3 5 Selec Mode of N A 5 3 6 Enable Disable 6 HARDWARE 5 1 1 tensa essa tens setas essa see sess sensa eese se 12 6 BEOCK DIAGRAM EETA E sete uazbatscuspsstubiaadeatssaepsscebsaivosedzeseuseasois dateatanaee 12 62 FUNCTIONAL DESCRIPTION 12 6 2 1 PCF8584 PC bus 12 6 2 2 PC parallel to oi NR 12 6 2 3 DC and core logic interface 12 6 2 4 UIS ule 13 6 2 5 e 13 7 CONNECTOR PIN INFORMAT ION eere ee eren eene seen netto aestas seta se tasse tns e ense etna ss 13 7 1 DB 25 PC PARALLEL PORT CONNECTOR 10 PIN ASSIGNMENT eene tenente nennen te
14. ll registers and prompt you to write to a specific register On selecting item 4 from the main menu the program will display the screen given in Figure 5 3 The program will prompt you to type the address of the register whose value you want to change On entering the address of the register and pressing Enter the program will prompt you to enter the new value that you want to assign If you want to return to the main menu type FF at the command prompt UM10028_ User s Guide Koninklijke Philips Electronics N V 2003 All rights reserved Rev 0 February 2003 10 of 18 Philips Semiconductors Descripti 0 00 01 Vendor I Ox04cc default 4 0 02 03 Product ID Ox1301 default 0x1301 Ox14 15 Chip Version 0 0100 default 0x0100 0x04 05 Mode Control 1 0x00 default 0x00 0x12 13 Mode Control 2 0x04 default 0x04 0x06 07 OTG Control 1 ere default 0 08 Interrupt Source OxAO default OxOA OB Interrupt Latch OxFF default 0x00 OxOC OD Interrupt Enable 0 0x00 default OxOE OF Interrupt Enable 1 0x00 default 0x00 uon wu m n n m L l Enter register address to write enter FF to exit Enter register value to write OXFF_ Figure 5 3 Read Write register screen display 5 3 5 Select Mode of Operation You can select the mode of operation of the ISP1301 by selecting item 5 from the main menu A submenu will appear on the screen See Figure 5 4 The possible choices include the USB f
15. nboard 3 3 V source or from the OTG Controller interface pin 2 of J8 Table 3 2 V and V selection Jumper Descriptions 2 Short the onboard 3 3 V source default Open V from the pin 2 of J3 JP5 Short V from the onboard 3 3 V source default Open from the pin 2 of J8 3 2 master selection The master controller can be supplied from any one of three sources e parallel port software master e Philips controller chip PCF8584 hardware master e External master that is connected to the header JI I Table 3 3 master selection Jumper Descriptions JP3 Short SDA 8584 and 2 SDA5V SDA from PCF8584 Short 2 SDA5V and 3 SDA PC SDA from PC parallel port default Open SDA from connector pin 4 of JI 1 JP4 Short SCL 8584 and 2 SCL5V SCL from PCF8584 Short 2 SCL5V and 3 SCL PC SCL from PC parallel port default Open SCA from connector 3 of JI 1 Note SCL and SDA come from the same l C master UM10028_1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 6 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 3 3 USB interface There are three USB connectors on the ISPI301 evaluation board OTG Controller is connected to the ISPI301 the USB port functions as OTG dual role
16. nente tten tnter tene 13 7 2 8 BIT MICROPROCESSOR INTERFACE 20 X 2 HEADER 13 PIN ASSIGNMENT cernerent tenente tnt 13 7 3 USB OTG CONTROLLER INTERFACE 8 X 2 HEADER 8 AND 3 PIN 55 02 13 8 SCHEMATICS OF THE EVALUATION 4 0000 0 14 9 BILL OF MATERIALG sccccssssssscssssescsssscessssscsesscsscsesscsscsensssssessssssssssessssscsesssescsesssosconsesonees 17 10 18 UMIO028 1 Koninklijke Philips Electronics 2003 All rights reserved User s Guide Rev 0 February 2003 3 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide TABLES Table ONU 6 Table 3 2 and selection 6 T ble 3 3 1 C master selection cete ERES e et UR ber bo det REA d manne 6 Table 7 1 DB 25 PC parallel port connector 10 pin assignment Table 7 2 8 bit microprocessor interface 20 x 2 header 13 pin assignment SAE Table 7 3 OTG Controller interface 8 pin assignment eene tnnt tenente ten tenttetten tenen 11 14 Table 7 4 OTG Controller interface 3 pin assignment eese tenente tenente ten 14 Table 9 1 BOM of the 1 1301 evaluation board 17 FIGURES Figure 1 1 15 1301 e
17. s are done correctly otherwise other operations may fail If you set the ISP1301 to the transparent mode and choose a slave address value other than the value set here you must set it back to the original slave address when you revert to the direct mode 5 3 2 Reset all registers On selecting this option the program will set all the registers excluding the read only registers to their default values and display these values on your PC screen In this document items that you type or click are indicated in bold UMIO028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 9 of 18 Philips Semiconductors 5 3 3 List all registers 15 1301 USB OTG Transceiver Eval Kit User s Guide On selecting this option the program will display all the 22 registers on the screen See Figure 5 2 Vendor ID Product ID Chip Version Mode Control 1 Mode Control 2 7 OTG Control 1 Interrupt Source Interrupt Latch Interrupt Enable O Interrupt Enable 1 0 1301 0 0100 0x00 0x04 OxAO 0x00 0x00 0x00 default default default default default default default default default default Press any key to return to previous menu _ CT OxO4CC 0x1301 0 0100 x00 0x04 0x00 0x00 0x00 Figure 5 2 List all registers screen display 5 3 4 Read Write register The program will display the current value of a
18. s interface provides connection to a Host Controller HC Device Controller DC or On The Go OTG core logic This interface is used during OTG system level evaluation or during compliance testing UMIO028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 12 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 6 2 4 Power manager This block includes the 5 0 V to 3 3 V regulator and power source selection 6 2 5 Audio interface This block provides stereo audio line IN interface and microphone with pre amp OUT interface Its main purpose is to demonstrate the carkit application play audio or voice with carkit 7 Connector pin information 7 1 DB 25 PC parallel port connector JI0 pin assignment JIO is used to connect to the PC parallel port through the DB 25 printer cable Table 7 1 shows its pin assignment Table 7 1 DB 25 PC parallel port connector J10 pin assignment Pin no Printer port signal 15 1301 evaluation board signal 9 D7 SDAOUT 11 S7 SDAIN 15 3 SCLIN 17 C3 SCLOUT 10 13 18 25 GND 1 8 12 14 16 No connection 7 2 8 bit microprocessor interface 20 x 2 header J13 pin assignment 13 is used to connect to a generic 8 bit parallel bus microprocessor controller The bus uses the Intel mode Required signals include 00 07 0 WR N RD CS INTI and INT2 Table 7 2
19. unctional mode four data encoding and decoding methods transparent mode transparent buffer mode USB suspend mode and global power down mode Note If the ISP1301 Engineering Sample ESI that is the chip whose version register reads 0x0100 or the chip package is marked AX is mounted on the evaluation board software cannot wake up the chip if set to the global power down mode Only a hardware reset can wake up the chip Auto z Mode Menu USB functional Mode Transparent I2C Mode Transparent Buffer Mode USB Suspend Mode Enable Disable Global Power Down Mode Enable Disable List Current Mode Esc return to previous menu Select Figure 5 4 Select Mode of Operation screen display 5 3 6 Enable Disable charge pump If the charge pump the ISP1301 is disabled selecting menu item 6 will enable the charge pump If the charge pump is enabled selecting menu item 6 will disable it UMIO028 1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 2003 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide 6 Hardware description 6 1 Block diagram Figure 6 1 shows the block diagram of the ISP1301 evaluation board N n M N 4 PIN PC X PARALLEL CONVERTER N
20. valuation board PCB 2 2 5 Figure 4 1 Location of major 8 Figure 5 1 Test program main 4 4 4 4 4 04 2222 Figure 5 2 List all registers screen display Figure 5 3 Read Write register screen display esee tenente tentent tten entente teniente tenente sten Figure 5 4 Select Mode of Operation screen display seen tente tentent Figure 6 1 Block diagram of the 51301 evaluation 12 Microsoft and Windows are registered trademarks of Microsoft Corp Intel is a registered trademark of Intel Inc The names of actual companies and products mentioned herein may be the trademarks of their respective owners All other names products and trademarks are the property of their respective owners UM10028_1 Koninklijke Philips Electronics N V 2003 All rights reserved User s Guide Rev 0 February 2003 4 of 18 Philips Semiconductors 15 1301 USB OTG Transceiver Eval Kit User s Guide Introduction 15 1301 is a Universal Serial Bus USB On The Go OTG transceiver device that is fully compliant with Universal Serial Bus Specification Rev 2 0 and On The Go Supplement to the USB 2 0 Specification Rev 1 0 It integrates USB full speed and low speed transceiver an
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