Errata Sheet
Contents
1. External Access Enable Pin EA page 7 2 There is an obvious contradiction in this section of course the EA input must be held low on ROMless devices Application Support Group Munich Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 11 of 112. Infineon technologies Microcontroller Components Errata Sheet March 30 2001 Release 1 0 Device SAB C161K LM SAF C161K LM Stepping Code Marking ES HA HA Package P MQFP 80 1 This Errata Sheet describes the deviations from the current user documentation The classification and numbering system is module oriented in a continual ascending sequence over several derivatives as well already solved deviations are included So gaps inside this enumeration could occur The current documentation is Data Sheet C161K C1610 Data Sheet V2 0 2001 01 User s Manual C161V K O User s Manual V1 0 12 96 C161K Step FA Specification Update 1998 12 Instruction Set Manual 12 97 Version 1 2 Note Devices marked with EES or ES are engineering samples which may not be completely tested in all functional and electrical characteristics therefore they should be used for evaluation only The specific test conditions for EES and ES are documented in a separate Status Sheet Change summary to Errata Sheet Rel 1 1 for devices with stepping code marking ES FA the following problems have been fixed BUS 17 Spikes on CS Lines after access with RDCS and or WRCS affects FA steps only BUS 18 PEC transfers after JMPR CPU 17 Arithmetic Overflow by DIVLU instruction the following items have been added modified e BFLDL BFLDH Instructions after Write Operation to internal IRAM CPU 21 e Application Hint Handling of
3. The Tasking support organization provides a v7 0r1 A166 Assembler build 177 including a check for problem CPU 21 with optional pec no_pec feature This assembler version can also be used to check code which was generated with previous versions of the Tasking tool chain A v7 0r1 C166 Compiler build 368 offering a workaround for problem CPU 21 is also available from Tasking The scan tool aiScan21 analyzes files in hex format plus user supplied additional information locator map file configuration file checks whether they may be affected by problem CPU 21 and produces diagnostic information about potentially critical instruction sequences This tool is included in AP1628 Scanning for Problem CPU 21 on http www infineon com cgi ecrm dll ecrm scripts prod_cat jsp 0id 8137 Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 5 of 11 Deviations from Electrical and Timing Specification The FA and HA step of the C161K are tested according to the specification in the C161K C1610 Data Sheet V2 0 2001 01 No deviations compared to this specification are known Due to this new reference AC problems AC t6 1 AC t22 1 AC t55 1 of the C161K AA step are implicitly fixed in the FA and HA step see following table and History List These three parameters are now specified as follows Standard Supply Voltage Range values for CPU clock of 16 MHz are listed for easier comparison with previous Data Sheet Symbol CPU C
4. byte of BFLDx mask field of BFLDL or data8 field of BFLDH and the destination address of the previous instruction or PEC transfer match in the following way a value of mask8 of BFLDL or data8 of BFLDH OF yh y 0 Fh and the previous instruction or PEC writes to the low and or high byte of GPR Ry or the memory address of Ry determined by the context pointer CP via any addressing mode b value of mask8 of BFLDL or data8 of BFLDH 00h 0EFh and the lower byte v of the contents v of the IRAM location or E SFR or GPR which is read by BFLDx is 00h lt v lt 7Fh and the previous instruction or PEC transfer writes to the low and or high byte of the specific bit addressable IRAM location OFDOOh 2 v i e the 8 bit offset address of the location in the bit addressable IRAM area OFDOOh OFDFFh equals v When the problem occurs the actual result all 16 bits of the BFLDx instruction is bitwise ORed with the byte or word result of the previous instruction or PEC transfer Notes Write operations in the sense of the problem description include implicit write accesses caused by auto increment operations of the PEC source or destination pointers which are located on OFCEOh 0FCFEh in IRAM post increment pre decrement operations on GPRs addressing modes with R or R write operations on the system stack which is located in IRAM In case PEC write operations to IRAM locations which match the abo
5. Another situation where a different system behaviour may be noticed is the case when only one character is transferred by the PEC into the transmit buffer register SSCTB In this case 2 interrupt requests from SSCTIR are expected the PEC COUNT 0 interrupt and the SSCTB empty interrupt in the FA and newer steps of the C161K the second interrupt request SSCTB empty is always systematically generated before the first one PEC COUNT 0 has been acknowledged by the CPU such that effectively only one interrupt request is generated for two different events before step FA of the C161K when the PEC transfer is performed with sufficient margin to the next clock tick from the SSC baud rate generator and no higher priority interrupt request has occurred in the meantime the PEC COUNT 0 interrupt will be acknowledged before the SSCTB empty interrupt request is generated i e two interrupts will occur based on these events However when the PEC transfer takes place relatively close before the next clock tick from the SSC baud rate generator or a higher priority interrupt request has occurred while the PEC transfer is performed the PEC COUNT 0 interrupt may not be acknowledged before the SSCTB empty interrupt request is generated such that effectively only one interrupt request will be generated for two different events In order to achieve a defined and systematic behavior with all device steps the SSC receive inte
6. empty the maximum delay between the time SSCTB has been written and flag SSCTIR 1 is up to 1 2 bit time Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 9of 11 b beginning with step FA internal stepping F12 of the C161K when SSCTB has been written while the transmit shift register was empty and the SSC is enabled flag SSCTIR is set to 1 directly after completion of the write operation independent of the selected baud rate When the transmit shift register is not empty when SSCTB was written SSCTIR is set to 1 after the last latching edge of SCLK 1 2 bit time before the first shifting edge of the next character See also e g C167CR User s Manual V3 1 p 12 5 The following diagram shows these relations in an example for a data transfer in master mode with SSCPO 0 and SSCPH 0 It is assumed that the transmit shift register is empty at the time the first character is written to SSCTB write to SSCTB first character write to SSCTB next character SCLK ese MTSR a case a SSCTIR 1 in previous device steps A case b SSCTIR 1 in current and future device steps Typically in interrupt driven systems no problems are expected from the modified timing of flag SSCTIR However when flag SSCTIR is polled by software in combination with other flags which are set cleared at the end or at the beginning of a transfer e g SSCBSY the modified timing may have an effect
7. lt 20h Workaround 1 When a critical instruction combination or PEC transfer to IRAM can occur then substitute the BFLDx instruction by a an equivalent sequence of single bit instructions This sequence may be included in an uninteruptable ATOMIC or EXTEND sequence to ensure completion after a defined time b an equivalent byte or word MOV or logical instruction Note that byte operations to SFRs always clear the non addressed complementary byte Note that protected bits in SFRs are overwritten by MOV or logical instructions Workaround 2 When a critical instruction combination occurs and PEC write operations to IRAM locations which match the above criteria bit addressable or active register bank area can be excluded then rearrange the BFLDx instruction within the instruction environment such that a non critical instruction sequence is generated Workaround 3 When a critical instruction combination or PEC transfer to IRAM can occur then replace the BFLDx instruction by the instruction sequence ATOMIC 1 BFLDx This means e g when BFLDx was a branch target before ATOMIC 1 is now the new branch target In case the BFLDx instruction is included at position nin an ATOMIC or EXTEND sequence with range operator m n m 2 4 n lt m then insert repeat the corresponding ATOMIC or EXTEND instruction at position n with range operator z where z m n 1 Poe Range of original ATOMIC EXTEND statement Positio
8. the SSCBSY Flag added Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 1 of 11 e Reference to C161K C1610 Data Sheet V2 0 2001 01 e Links to Infineon Technologies Internet Pages updated e Section Functional Improvements Compatibility Aspects extended Timing of SSCTIR Contents of IDCHIP e Section Documentation Update added Counter Mode for T5 Pin EA for ROMless devices Functional Problems PWRDN 1 Execution of PWRDN Instruction while pin NMI high When instruction PWRDN is executed while pin NMI is at a high level power down mode should not be entered and the PWRDN instruction should be ignored However under the conditions described below the PWRDN instruction may not be ignored and no further instructions are fetched from external memory i e the CPU is in a quasi idle state This problem will only occur in the following situations a the instructions following the PWRDN instruction are located in external memory and a multiplexed bus configuration with memory tristate waitstate bit MTT Cx 0 is used or b the instruction preceding the PWRDN instruction writes to external memory and the instructions following the PWRDN instruction are located in external memory In this case the problem will occur for any bus configuration Note the on chip peripherals are still working correctly in particular the Watchdog Timer will reset the device upon an overflow Interrupts and PEC transfer
9. ects In the following sections the functional improvements which have been implemented in the C161K beginning with the FA step are described 1 The Bootstrap Loader Acknowledge Byte returned by FA HA step devices is D5h AA step B5h 2 The Address Window Arbitration feature as described in the C161V K O User s Manual V1 0 p 8 21 is implemented in C161K devices beginning with stepping code FA Compatibility systems designed for earlier steps of the C161K will also work with the FA HA step 3 The internal oscillator inverter Type_RE has been improved It is compatible to external circuits as described in ApNote 2420 Crystal Oscillators of the C500 and C166 Microcontroller Families for Type_R oscillator inverter see table 14 page 34 in Rel 0 5 4 99 page numbers may be different in previous releases However it is strongly recommended to verify the safety factor in the target application as described in this application note Location of the ApNote on the Internet direct link to pdf file http www infineon com cgi ecrm dll ecrm scripts prod_cat jsp 0id 8137 http www infineon com cmc_upload migrated_files document_files Application Notes ap242005 pdf 4 The General Purpose Timers additionally provide the Incremental Interface mode which allows to interface to incremental position sensors A B Top0 Optionally the contents of T5 may be captured into register CAPREL upon an event on T3 A detailed description of th
10. est according to C161K C1610 Data Sheet V2 0 2001 01 Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 7 of 11 Application Hints Handling of the SSC Busy Flag SSCBSY In master mode of the High Speed Synchronous Serial Interface SSC when register SSCTB has been written flag SSCBSY is set to 1 when the baud rate generator generates the next internal clock pulse The maximum delay between the time SSCTB has been written and flag SSCBSY 1 is up to 1 2 bit time SSCBSY is cleared 1 2 bit time after the last latching edge When polling flag SSCBSY after SSCTB has been written SSCBSY may not yet be set to 1 when it is tested for the first time in particular at lower baud rates Therefore e g the following alternative methods are recommended 1 test flag SSCRIR receive interrupt request instead of SSCBSY in case the receive interrupt request is not serviced by CPU interrupt or PEC e g loop BCLR SSCRIR clear receive interrupt request flag MOV SSCTB XYZ send character wait_tx_complete JNB SSCRIR wait_tx_complete test SSCRIR JB SSCBSY wait_tx_complete test SSCBSY to achieve original timing SSCRIR may be set 1 2 bit time before SSCBSY is cleared use a software semaphore bit which is set when SSCTB is written and is cleared in the SSC receive interrupt routine Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 8of 11 Functional Improvements Compatibility Asp
11. is feature is included in the Documentation Addendum GPT Incremental Interface Mode V1 0 1998 10 5 Besides bit WDTR which indicates a watchdog timer reset additional Reset Source Indication Flags have been implemented in register WDTCON to signal other reset types software reset long short hardware reset While in previous steps only reset values 0000h or 0002h could occur in register WDTCON in the FA step further values may occur in the low byte of WDTCON Unlike the other reset source indication flags WDTR is not cleared by instructions EINIT or SRST Therefore programs written for previous steps which evaluate the contents of WDTCON directly after reset and before execution of EINIT may work differently on the FA HA step The following table summarizes the behaviour of the reset source indication flags LHWR SHWR SWR WDTR WDTCON 4 WDTCON 3 WDTCON 2 WDTCON 1 Long HW Reset 1 1 0 Short HW Reset SRST instruction WDT Reset EINIT instruction SRVWDT instruction Legend 1 flag is set 0 flag is cleared flag is not affected 6 Timing of flag SSCTIR SSC Transmit Interrupt Request In master mode the timing of SSCTIR depends on the device step as follows a before step FA internal stepping F11 of the C161K flag SSCTIR is set to 1 synchronous to the shift clock SCLK 1 2 bit time before the first latching edge first shifting clock edge when SSCPH 0 When SSCTB is written while the shift register is
12. lock Variable CPU Clock ae eel BE a 1 ara MHz Address hold after t55 6 tf 6 tf ns RDCS WRCS The notes about the internal pull ups on pins P6 0 3 and the note about the test conditions for t28 which were contained in previous versions of the C161K Errata Sheet have been included in the C161K C1610 Data Sheet V2 0 2001 01 Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 6 of 11 History List since device step AA Functional Problems Functional Short Description Fixed in Problem step CPU 7 Warm hardware reset pulse length lt 1032 TCL CPU 8 Jump instructions in EXTEND sequence CPU 9 PEC Transfers during instruction execution from Internal RAM CPU 11 Stack Underflow Trap during restart of interrupted Multiplication CPU 17 Arithmetic Overflow by DIVLU instruction CPU 21 BFLDLIH Instructions after Write Operation to internal IRAM steps FA or higher FA BUS 17 Spikes on CS Lines after access with RDCS and or WRCS FA step HA only BUS 18 PEC transfers after JMPR PWRDN 1__ Execution of PWRDN Instruction while pin NMI high RST 1 System Configuration via POL O during Software Watchdog Timer Reset AC DC Deviations AC DC Short Description Fixed in Deviation step DC RRST 1 RSTIN pull up 25 to 125 KQ ca AC t6 1 Address setup to ALE TCL 17 5 ns FA AC t22 1 Data valid to WR 2TCL 20ns AC t55 1 Address hold after RDCS WRCS 10ns cA t
13. n of BFLDx 1 3 4 EXT sequence workaround workaround workaround workaround fs atest Zs an eg ee fe ee Ne case can not occur Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 4o0f 11 Tool Support for Problem CPU 21 The Keil C166 Compiler V3 xx generates BFLD instructions only in the following cases when using the _ bfld_ intrinsic function at the beginning of interrupt service routines when using pragma disable at the end of interrupt service routines when using the chip bypass directive FIX166 The C166 Compiler V4 xx uses the BFLD instruction to optimize bit field struct accesses Release C166 V4 10 offers a new directive called FIXBFLD that inserts an ATOMIC 1 instruction before every BFLD instruction that is not enclosed in an EXTR sequence Detailed information can be found in the C166 HLP RELEASE TXT of C166 Version 4 10 The C166 Run Time Library for C166 V3 xx and V4 xx uses BFLD instructions only in the START167 A66 file This part of the code should be not affected by the CPU 21 problem but should be checked by the software designer The RTX166 Full Real Time Operating system any version does not use BFLD instructions For RTX166 Tiny you should rebuild the RTX166 Tiny library with the SET FIXBFLD 1 directive This directive is enabled in the assembler source file RTX166T A66 After change of this setting rebuild the RTX166 Tiny library that you are using in your application
14. rrupt which is generated at the end of a character transmission may be used instead of the SSC transmit interrupt 7 The contents of register IDCHIP for the HA step is 0513h Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 10 of 11 Documentation Update reference C161V K O User s Manual V1 0 12 96 Counter Mode for T5 page 9 20 ff The C161V K O manual V1 0 12 96 states that only timer mode can be selected for T5 in control field T5M in register TSCON Of course also counter mode is possible when the transitions of T6OTL which are caused by over undeflows of T6 are used to clock T5 see figure on page 9 22 Counter Mode in this context is selected via T5M 01b Edge selection is performed via bit field T5I 101b positive transition 0 1 of TEOTL 110b negative transition 1 0 of TEOTL 111b any transition of TEOTL Please note that several figures adopted from the C167 manual in the chapter about GPT2 in the current C161V K O manual contain references to pins which are not available on the C161O K devices These references will be corrected eliminated in the next revision of the manual The C161PI manual V1 0 already includes an updated GPT2 chapter You may access it on http www infineon com cgi ecrm dll ecrm scripts prod_cat jsp 0id 8137 by clicking on C161PI RI and then scroll down to User s Manual or directly via http www infineon com cmc_upload 0 000 011 711 c161pi um _v10 pdf
15. s however can not be processed In case NMI is asserted low while the device is in this quasi idle state power down mode is entered Workaround Ensure that no instruction which writes to external memory precedes the PWRDN instruction otherwise insert e g a NOP instruction in front of PWRDN When a muliplexed bus with memory tristate waitstate is used the PWRDN instruction should be executed out of internal RAM Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 2of 11 CPU 21 BFLDL BFLODH Instructions after Write Operation to internal IRAM The result of a BFLDL BFLDH BFLDx instruction may be incorrect if the following conditions are true at the same time 1 the previous instruction is a PEC transfer which writes to IRAM or any instruction with result write back to IRAM addresses OF200h 0FDFFh for 3 Kbyte module OF600h 0FDFFh for 2 Kbyte module or OFAOOh OFDFFh for 1 Kbyte module For further restrictions on the destination address see case a or case b below 2 the BFLDx instruction immediately follows the previous instruction or PEC transfer within the instruction pipeline back to back execution i e decode phase of BFLDx and execute phase of the previous instruction or PEC transfer coincide This situation typically occurs during program execution from internal program memory ROM OTP Flash or when the instruction queue is full during program execution from external memory 3 the 3
16. ve criteria bit addressable or active register bank area PEC pointers not overlapping with register bank area can be excluded the problem will not occur when the instruction preceding BFLDx in the dynamic flow of the program is one of the following instructions which do not write to IRAM NOP ATOMIC EXTx CALLA CALLI JBC JNBS when branch condition false JMPx JB JNB RETx except RETP CMP B except addressing mode with Rwi BCMP MULx DIVx IDLE PWRDN DISWDT SRVWDT EINIT SRST For implicit IRAM write operations caused by auto increment operations of the PEC source or destination pointers the problem can only occur if the value of mask8 of BFLDL or data8 of BFLDH OF yh y 0 Fh and the range which is covered by the context pointer CP partially or completely overlaps the PEC source and destination pointer area OFCEOh OFCFEh and the address of the source or destination pointer which is auto incremented after the PEC transfer is equal to the address of GPR Ry included in case 3a Microcontroller Division Errata Sheet C161K LM ES HA 1 0 Mh 3 of 11 For system stack write operations the problem can only occur if the system stack is located in the bit addressable portion of IRAM OFDOOh 0FDFFh or if the system stack can overlap the register bank area i e the register bank area is located below the system stack and the distance between the contents of the context pointer CP and the stack pointer SP is
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