MC68HC68 MOTOROLA [Motorola, Inc], MC68HC68 Datasheet - Page 11

• Manufacturer Part Number: MC68HC68
• Description: Real-Time Clock plus RAM with Serial Interface
• Manufacturer: MOTOROLA [Motorola, Inc]

MOTOROLA
V DD
NOTE: A 60 Hz, 10 V p–p sine–wave voltage is an acceptable signal to present at the LINE input pin.
0 V
MSB
INTERRUPT
REGISTER
CONTROL
INTERFACE
SERIAL
1
Figure 9. Software Power–Down Functional Diagram
REAL–TIME CLOCK
Figure 8. Power Sensing Functional Diagram
MC68HC68T1
V DD
CLKOUT
CPUR
XTAL in
XTAL out
LINE
MSB
V SYS
LSB
PSE
(STATUS REGISTER)
REAL–TIME CLOCK
POWER CONTROL
MC68HC68T1
TO SYSTEM
MISO
MOSI
V DD
1
V BATT
LSB
INT
OSC 1
RESET
MC68HC05C4
CPU
V DD
IRQ
MC68HC05C4
CPU
MC68HC68T1
11