pcf2123 NXP Semiconductors, pcf2123 Datasheet - Page 37
pcf2123
Manufacturer Part Number
pcf2123
Description
Spi Real Time Clock/calendar
Manufacturer
NXP Semiconductors
Datasheet
1.PCF2123.pdf
(54 pages)
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NXP Semiconductors
PCF2123_1
Product data sheet
The watchdog is implemented to prevent the excessive loss of time due to interface
access failure e.g. if main power is removed from a battery backed-up system during an
interface access.
Each time the watchdog period is exceeded, 1 s will be lost from the time counters. The
watchdog will trigger between 1 s and 2 s after receiving a valid subaddress.
Rev. 01 — 19 November 2008
SPI Real time clock/calendar
PCF2123
© NXP B.V. 2008. All rights reserved.
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