ANALOG DEVICES ADuC832: Errata Sheet (Rev B1 2002-11-01-)
Contents
1. 832_S01 NUMBER OF ADC CLOCKS IN PIPLINED MODE Backgound An adc conversion takes 16 ADC clocks plus the selected acquisition clocks Issue At voltages below 3 5V in piplined mode the number of ADC clocks required for a conversion can vary between 15 and 16 ADC clocks Work Around none Related Issues This issue does not affect the performance of the ADC 832_S02 DAC CLEAR BIT FUNCTIONALITY Backgound The DAC outputs are controlled by the SFR DACCON The CLRI and CLRO bits in DACCON can be used to force the output of DAC1 and DACO to OV Issue When the DAC is enabled and in buffered mode setting the CLR1 or CLRO bits may cause a momentary spike on the DAC ouput before the DAC is forced to OV Work Around To force the output of DAC1 or DACO to OV write 0000H to the corresponding DAC data registers Related Issues none 2 of 3 REV B 1 November 2002 ADuC832 Errata Sheet 832_S03 EXTENDED 11 BIT STACK POINTER PUSH AND POP OPERATION Backgound The ADuC832 offers an extended 11 bit stack pointer that allows the stack to extend into the 2 KBytes of internal XRAM This can be very useful where embedded functions are used Issue If the extended stack pointer is enabled CFG832 7 1 and the stack points to the extended stack space SPH gt 1 the the PUSH direct or POP direct instructions will not operate correctly if the direct address is less than 80H i e not an SFR Work Around Assembly Programming By2. using the Accumulator the extended stack works correctly e g To PUSH MOV A 0 To POP POP ACC PUSH ACC MOV 0 A C Programming KEIL Compier The KEIL Compiler only ever pushes or pops and SFR or any of the 32 registers 4 banks of 8 registers onto the stack Keil support a compiler directive that disables absolute register addressing pragma NOAREGS Using this directive a PUSH POP register will be automatically changed as above pragma NOAREGS int increment int void main void r increment a increment b int increment int a return a t1 Related Issues none 3 of 3 REV B 1 November 2002
3. ANALOG MicroConverter Multi Channel 12 bit DEVICES ADCs and DACs with Embedded FLASH MCU Errata Sheet ADuC832 A This Errata sheet contains the following known bugs anomalies and work arounds for the ADuC832 MicroConverter 832_S01 NUMBER OF ADC CLOCKS IN PIPLINED MODE 832_S02 DAC CLEAR BIT FUNCTIONALITY 832_S03 EXTENDED 11 BIT STACK POINTER PUSH AND POP OPERATION B The Errata listed apply to all ADuC832 packaged material branded as follows First Line ADuC832XX Fourth Line BXX C Analog Devices Inc is committed through future silicon revisions to continuously improve silicon functionality Analog Devices Inc will use its best endeavors to ensure that these future silicon revisions remain compatible with your present software systems that implement the recommended work arounds outlined in this document REV B 1 November 2002 Information furnished by Analog Devices is believed to be accurate and MicroConverter is a Trademark of Analog Devices Inc reliable However no responsibility is assumed by Analog Devices for its use nor for any infringements of patents or other rights of third parties One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A which may result from its use No license is granted by implication or Tel 781 329 4700 World Wide Web Site http www analog com otherwise under any patent or patent rights of Analog Devices Fax 781 326 8703 Analog Devices Inc 2002 ADuC832 Errata Sheet
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ANALOG DEVICES ADuC832: Errata Sheet (Rev B1 2002 11 01 )