Sanyo ICR-B100 Service Manual page 10

IC BLOCK DIAGRAM
IC404 RS5C372A (CMOS Real Time Clock)
OSCIN
7
OSC
OSCOUT 6
DETECT
/INTRA
5
/INTRB 1
IC405 SB2020P (Ascent and Descent type DC-DC Convertor)
Lx 8
GND 1
CE 6
IC413 S-81233GS (Voltage Regulator)
COMPARATOR_A
32kHz OUTPUT
CONTROL
COMPARATOR_B
DIVIDER
CORREC
DIV
-TION
OSC
INTERRUPT CONTROL
SWR_EXT
7
Buffer,
Driver
Noh MOS
SW
PWM
Comparator
Ramp Wave
Generator,
OSC
V
2
IN
GND 1
ALARM_A REGISTER
(WEEK,MIN,HOUR)
ALARM_B REGISTER
(WEEK,MIN,HOUR)
TIME COUNTER
(SEC,MIN,HOUR,WEEK,MONTH,YEAR)
ADDRESS ADDRESS
DECODER REGISTER
SHIFT REGISTER
Internal VDD
Phase
Compensation
SWR
Error Amp.
PWM/PFM
Vret with
Dual Mode
Soft Start
Controller
4
CSS
REFERENCE
VOLTAGE
- 9 -
I/O
CONTROL
5 VUP
3 VR_EXT
2 VOUT
VR
Error Amp.
3 V
OUT
NC
8 V
DD
4
V
SS
2 SCL
3 SDA