AS3658F-BCTP datasheet(143/158 Pages) AMSCO

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Table 176. RTCT Register

Addr:72

RTCT

These bits set the RTC correction and RTC interrupt mode

Bit

Bit Name

Default

Access

Description

Table 177. Reset Timer Register

Addr:22

Reset Timer

These bits set RTC modes

Bit

Bit Name

Default

Access

Description

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Revision 1v13

142 - 157

AS3658

Data Sheet Confidential - Deta il ed Descri ption - System Functi ons

6:0

RTC_TBC<6:0>

0000000

R/W

These bits are used to correct the inaccuracy of the

used 32kHz crystal. Correction is done all 8 seconds

by removing or adding two clock cycles.

Trimming register for RTC, 128 steps @ 7.6ppm

100000

- 480.4ppm

100001

-472.8ppm

111111

-7.6ppm

000000

0ppm(default)

000001

7.6ppm

011110

472.8ppm

011111

480.4ppm

rtc_irq_mode

R/W

generate an interrupt every second

generate an interrupt every minute

The interrupt has to be enabled by

rtc_rep_int_m=0

rtc_alarm_wakeup_en

ROM

R/W

Disables RTC alarm wakeup in power off

mode

Enable RTC alarm wakeup in power off mode

rtc_rep_wakeup_en

ROM

R/W

Disables RTC repeated wakeup in power off

mode

Enable RTC repeated wakeup in power off

mode

7:6

rtc_mode

ROM

R/W

32kHz oscillator off

32kHz oscillator enabled

32kHz oscillator enabled, Pin Q32k enabled

reserved (do not use)

AS3658F-BCTP Datasheet(PDF) 143 Page - ams AG

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