Pioneer DVR-220-S Service Manual page 98

1
RS5C372A (JCKB ASSY : IC203)
• Real Time Clock IC
Block Diagram
A
OSCIN
OSCOUT 6
/INTRA 5
B
/INTRB 1
Pin Function
No. Pin Name I/O
C
1 /INTRB O
2 SCL I
3 SDA I/O
−
4 VSS
D
5 /INTRA O
6 OSCOUT O
7 OSCIN I
−
8 VDD
E
F
98
1
2
32kHz Output
Control
7
Driver
OSC DIV
Correction
OSC
Detect
Interrupt Control
Interruption output B
The output of 32.768kHz (in 32768Hz crystal use), cycled interrupt for CPU, or output alarm interrupt
(ALARM_B). This pin output 32.768kHz when activated power from 0V.
Nch open drain output.
Shift clock input
Synchronize with this clock, and input and output data from a SDA terminal.
Exceed VDD, and can input to 6V.
Serial input and output
Synchronize with SCL, and input and output writing data or readout data.
Exceed VDD, and can input to 6V. Nch open drain output in the output.
Ground pin
Interruption output A
Cycled interrupt for CPU, or output alarm interruption (ALARM_A, ALARM_B).
This pin becomes an OFF state when activated power from 0V. N ch open drain output.
Connect a crystal resonator of 32.768kHz or 32.000kHz between OSCIN and
Oscillation circuit output
OSCOUT, and constitute oscillation circuit.
Oscillation circuit input
(component parts of oscillation circuit except crystal resonator have it built-in.)
Positive supply input
2
3
Alarm_A Register
Comparator_A
(WEEK, MIN, HOUR)
Alarm_B Register
Comparator_B
(WEEK, MIN, HOUR)
Time Counter
(SEC, MIN, HOUR, WEEK, DAY, MONTH, YEAR)
Address Address
Decoder Resister
Shift Resister
Function
DVR-220-S
3
4
VDD
8
VSS
4
2 SCL
I/O
Control
3 SDA
4