ISL12027_10 Datasheet, PDF (3/28 Pages) Intersil Corporation – Real Time Clock/Calendar with EEPROM

Block Diagram
X1
32.768kHZ
X2
ISL12027, ISL12027A
OSC COMPENSATION
OSCILLATOR
FREQUENCY
1Hz
TIMER
CALENDAR
DIVIDER
LOGIC
TIME
KEEPING
REGISTERS
(SRAM)
BATTERY
SWITCH
CIRCUITRY
SCL
SDA
SERIAL
INTERFACE
DECODER
CONTROL
DECODE
LOGIC
CONTROL/
REGISTERS
(EEPROM)
STATUS
REGISTERS
(SRAM)
ALARM
8
RESET
WATCHDOG LOW VOLTAGE
TIMER
RESET
COMPARE
ALARM REGS
(EEPROM)
4k
EEPROM
ARRAY
V_DD
V_BAT
3
FN8232.8
August 12, 2010