PCF2129AT datasheet(9/68 Pages) NXP

9 / 68 page

PCF2129A_1

Product data sheet

Rev. 01 — 13 January 2010

9 of 68

NXP Semiconductors

PCF2129A

Integrated RTC, TCXO and quartz crystal

8.2.2 Register Control_2

[1]

Default value.

[2]

When writing to the register this bit has always to be set logic 0.

Table 6.

Control_2 - control and status register 2 (address 01h) bit description

Bit

Symbol

Value

Description

Reference

7MSF

[1]

no minute or second interrupt generated

Section 8.12

flag set when minute or second interrupt

generated;

flag must be cleared to clear interrupt

6WDTF

[1]

no watchdog timer interrupt or reset

generated

Section 8.12.3

flag set when watchdog timer interrupt or

reset generated;

flag cannot be cleared by using the

interface (read-only)

5TSF2

[1]

no timestamp interrupt generated

Section 8.11.1

flag set when TS input is driven to ground;

flag must be cleared to clear interrupt

4AF

[1]

no alarm interrupt generated

Section 8.9.6

flag set when alarm triggered;

flag must be cleared to clear interrupt

[2]

unused

2TSIE

[1]

no interrupt generated from timestamp flag

Section 8.12.5

interrupt generated when timestamp flag set

1AIE

[1]

no interrupt generated from the alarm flag

Section 8.12.4

interrupt generated when alarm flag set

[2]

unused

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