PCF2129T 데이터 시트보기 (PDF) - NXP Semiconductors.

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PCF2129T

Accurate RTC with integrated quartz crystal for industrial

NXP Semiconductors. 

NXP Semiconductors

PCF2129T

Accurate RTC with integrated quartz crystal for industrial

8.2.3 Register Control_3

Table 8. Control_3 - control and status register 3 (address 02h) bit description

Bit Symbol

Value Description

Reference

7 to 5 PWRMNG[2:0] [1]

control of the battery switch-over, battery low Section 8.5

detection, and extra power fail detection

functions

4

BTSE

0

[2] no timestamp when battery switch-over

occurs

Section 8.11.4

1

time-stamped when battery switch-over

occurs

3

BF

0

[2] no battery switch-over interrupt generated Section 8.5.1

1

flag set when battery switch-over occurs;

and

Section 8.11.4

flag must be cleared to clear interrupt

2

BLF

0

[2] battery status ok;

Section 8.5.3

no battery low interrupt generated

1

battery status low;

flag cannot be cleared by command

1

BIE

0

[2] no interrupt generated from the battery

flag (BF)

Section 8.12.6

1

interrupt generated when BF is set

0

BLIE

0

[2] no interrupt generated from battery low

flag (BLF)

Section 8.12.7

1

interrupt generated when BLF is set

[1] Values see Table 14.

[2] Default value.

PCF2129T

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 3 — 12 February 2013

© NXP B.V. 2013. All rights reserved.

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