CBC34123 EnerChip™ RTC

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DS-72-31 V.08

Page 2 of 9

Preliminary

Figure 3: Internal Schematic of CBC34123 EnerChip RTC

Figure 2: CBC34123 Block Diagram with Registers

TIMER FUNCTION

Timer_clkout

0Eh

OFFSET FUNCTION

Offset_register

0Dh

Countdown_timer

0Fh

CONTROL

Control_1

00h

Control_2

01h

TIME

Seconds

02h

Minutes

03h

Hours

04h

Days

05h

Weekdays

06h

Months

07h

Years

08h

ALARM FUNCTION

Minute_alarm

09h

Hour_alarm

0Ah

Day_alarm

0Bh

Weekday_alarm

0Ch

SPI

INTERFACE

WATCH

DOG

OSCILLATOR

32.768 kHz

MONITOR

DIVIDER

CLOCKOUT

INTERRUPT

CE

SCL

SDI

SDO

OSCI

OSCO

POWERON

RESET

INT

CLKOE

CLKOUT

VDD

VSS

TEST

ENERCHIP

AND

CHARGER

EN

RESET

VEC

VCHG

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16