Analog Devices Errata814 D0 Datasheet

MicroConverter, Small Package

a

12-bit ADC with Embedded Flash MCU

Silicon Errata Sheet ADuC814

A. This Errata sheet represents the known bugs, anomalies and work-arounds for the ADuC814

MicroConverter.

B. The Errata listed, apply to all ADuC814 packaged material branded as follows:

First Line: ADuC814
Second Line: XRU (where X is A or B)
Third Line: D20

C. Errata Sheets referring to previous silicon revisions are available on our web-site at

http://www.analog.com/microconverter/erratasheets.html

D. Because of silicon revisions and improved work-arounds, this Errata Sheet will be updated periodically.

Please find the latest Errata Sheet listed on the World Wide Web at :

http://www.analog.com/microconverter/erratasheets.html

E. 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 implementing the recommended
work-arounds outlined in this document.

REV. D.0 April/02

Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights
of Analog Devices.

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® MicroConverter is a Trademark of Analog Devices, Inc.

Tel: [phone] World Wide Web Site: http://www.analog.com

Fax: [phone] Analog Devices, Inc., 2002

Silicon Errata Sheet ADuC814

814_S02. RESET FUNCTION - TIME INTERVAL COUNTER FUNCTION ON RESET :

Background: The Time Interval Counter can be configured to time intervals ranging

from 128th of a second to 255 hours. The Time Interval Counter will continue to
count after a reset i.e. bit 0 in TIMECON will remain active after a reset event
(Watchdog Timer or Reset Pin Toggle) and will only be cleared after a power cycle
event.

Issue: If the part is in 24 hour mode (TIMECON.6 = 1) this bit will be cleared after any

reset event and the part will now count in 255 hour mode.

Work-Around : Adding the following code at the start of the main program ensures the Time

Interval Counter will count in 24 hour mode after a reset.

MOV A,TIMECON ; TIMECON -> A
RRC A ; TIMECON.0 -> C
JNC NOTSET ; TIC Enabled?
ORL TIMECON,#01000000B ; If enabled set TIMECON.6

NOTSET: ; continue normal code

Related Issues : None

Page 2 of 2 Rev. D.0 April/02