AS3658F-BCTP datasheet(142/158 Pages) AMSCO

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AS3658

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

The RTC module includes an alarm function. When the content of the RTC 1…4 registers equals the content of the

RTC Alarm 1…4 registers bit RTCAlarm will be set in the Interrupt 1 register. Furthermore the RTC module can

generate an interrupt every second (RTC1Sec will be set) and every minute (RTC1min will be set every time the 6-bit

second counter is reset to 0). For further details on interrupt generation please refer to Interrupt Controller on page

124.

To avoid ambiguous behavior during write access to the RTC Alarm 1…4 registers any write access to the RTC Alarm

1 register will disable the alarm function; any subsequent write access to the RTC Alarm 4 will enable the alarm

function again.

Table 172. RTC Alarm second Register

Addr:68

RTC AlarmSecond

These bits set the RTC Alarm Seconds

Bit

Bit Name

Default

Access

Description

Table 173. RTC Alarm minute1 Register

Addr:69

RTC AlarmMinute1

These bits set the RTC Alarm Minute1

Bit

Bit Name

Default

Access

Description

Table 174. RTC Alarm minute2 Register

Addr:70

RTC AlarmMinute2

These bits set the RTC Alarm Minute2

Bit

Bit Name

Default

Access

Description

Table 175. RTC Alarm minute3Register

Addr:71

RTC AlarmMinute3

These bits set the RTC Alarm Minute3

Bit

Bit Name

Default

Access

Description

5:0

RTCAlarmSecond

3Fh

R/W

Bits 5…0 of 6-bit RTC second alarm value

7:0

RTCAlarmMinute1

FFh

Bits 7:0 of the 24-bit RTC minute alarm value

7:0

RTCAlarmMinute2

FFh

Bits 15:8 of the 24-bit RTC minute alarm value

7:0

RTCAlarmMinute3

FFh

Bits 23:16 of the 24-bit RTC minute alarm value

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