AN2556 datasheet(14/35 Pages) STMICROELECTRONICS

14 / 35 page

Modified features

AN2556

14/35

In the ST10F273Z4 these flags are cleared by writing them to 1.

In the ST10F269Zx these flags are cleared by writing them to 0.

As these flags must be cleared by software when entering the corresponding interrupt

service routine, a change in the application code is needed.

Example for RTCSIR flag

Replace the ST10F269Zx code:

RTCCON &= 0xFFFE;// Clear RTCSIR flag

by the following code for ST10F273Z4:

RTCCON |= 0x0001;// Write 1 into RTCSIR flag to clear it

ST10F269Zx: RTCCON (F1C4h/E2h)

ESFR

Reset value: --00h

7654

3210

Reserved

RTC

OFF

Reserved

RTC

AEN

RTC

AIR

RTC

SEN

RTC

SIR

ST10F273Z4: RTCCON (F1C4h/E2h)

ESFR

Reset value: 0000h

7654

3210

Reserved

OFF

OSC

RTC

OFF

Reserved

RTC

AEN

RTC

AIR

RTC

SEN

RTC

SIR

Table 9.

RTCCON register bits

Bit

Function

Reset

value

RTCSIR

RTC Second Interrupt Request flag (every basic clock unit)

0: The bit is reset less than a Basic Clock unit ago.

1: Interrupt is triggered.

RTCSEN

RTC Second interrupt Enable

0: RTC_SecIT is disabled.

1: RTC_SecIT is enabled, it is generated every basic clock unit.

RTCAIR

RTC Alarm Interrupt Request flag (when the alarm is triggered)

0: The bit is reset less than a Basic Clock unit ago.

1: Interrupt is triggered.

RTCAEN

RTC Alarm Interrupt Enable

0: RTC_alarmIT is disabled.

1: RTC_alarmIT is enabled.

RTCOFF

RTC Switch Off bit

0: Clock oscillator and RTC run during Power Down mode.

1: Clock oscillator is switched off during Power Down mode; RTC dividers

and counters are stopped and registers can be written.

AN2556 Datasheet(PDF) 14 Page - STMicroelectronics

AN2556 Datasheet(HTML) 14 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Datasheet Download

Link URL