M48T59-70PC1(2008) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M48T59-70PC1
(Rev.:2008)

5.0 or 3.3 V, 64 Kbit (8 Kbit x 8) TIMEKEEPER® SRAM

STMicroelectronics 

M48T59, M48T59Y, M48T59V

Clock operations

Table 5. Register map

Data

Address

D7 D6 D5 D4 D3 D2 D1 D0

Function/range

BCD format

1FFFh

10 Years

Year

Year

00-99

1FFEh

0

0

0 10 M

Month

Month

01-12

1FFDh

0

0

10 date

Date

Date

01-31

1FFCh

0 FT CEB CB 0

Day

Century/day 00-01/01-07

1FFBh

0

0 10 hours

Hours

Hours

00-23

1FFAh

0

10 minutes

Minutes

Minutes

00-59

1FF9h ST

10 seconds

Seconds

Seconds

00-59

1FF8h

WRS

Calibration

Control

1FF7h

WDS

BMB

4

BMB

3

BMB

2

BMB

1

BMB

0

RB1

RB0

Watchdog

1FF6h

1FF5h

t(s) 1FF4h

c 1FF3h

u 1FF2h

rod 1FF1h

P 1FF0h

AFE Y ABE Y

RPT4 Y Al. 10 date

RPT3 Y Al. 10 hours

RPT2 Alarm 10 minutes

RPT1 Alarm 10 seconds

Y

Y

YY

WDF AF Z BL

Y Y YY

Alarm date

Alarm hours

Alarm minutes

Alarm seconds

Y Y YY

Z Z ZZ

te Keys:

le S = Sign bit

so FT = Frequency test bit

b R = Read bit

- O W = Write bit

t(s) ST = Stop bit

0 = Must be set to '0'

uc Y = '1' or '0'

rod Z = '0' and are read only

AF = Alarm flag (read only)

te P BL = Battery low (read only)

le WDS = Watchdog steering bit

o BMB0-BMB4 = Watchdog multiplier bits

bs RB0-RB1 = Watchdog resolution bits

O AFE = Alarm flag enable

Interrupts

Alarm date

Alarm hours

Alarm minutes

Alarm seconds

Unused

Flags

01-31

00-23

00-59

00-59

ABE = Alarm in battery back-up mode enable

RPT1-RPT4 = Alarm repeat mode bits

WDF = Watchdog flag (read only)

CEB = Century enable bit

CB = Century bit

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