MC68HC68T1 Datasheet, PDF (2/26 Pages) Motorola, Inc – Real-Time Clock plus RAM with Serial Interface

BLOCK DIAGRAM
AM/PM
AND HOUR LOGIC
CALENDAR
LOGIC
XTALin ¹⁴
XTALout ¹⁵
13
VBATT
11
LINE
OSCILLATOR
PRESCALE
SECOND
50/60 Hz
STOP/START
PRESCALE CLOCK
SELECT SELECT
MINUTE
HOUR
DAY/
DATE
1
CLKOUT
3
INT
CLOCK
AND
INT
LOGIC
VSYS ¹²
10
POR
PSE ⁹
CPUR ²
SCK ⁴
MISO ⁶
5
MOSI
SS ⁷
POWER
SENSE
CONTROL
CLOCK
CONTROL REG
INTERRUPT
CONTROL REG
STATUS
REGISTER
8–BIT DATA BUS
COMPARATOR
SECOND MINUTE
LATCH LATCH
HOUR
LATCH
32 x 8
RAM
SERIAL
INTERFACE
FREEZE
CIRCUIT
PIN 16 = VDD
PIN 8 = VSS
MONTH
YEAR
MC68HC68T1
2
MOTOROLA