Sanyo DC-MCR300, Service Manual

Page: 16 / 20

- 15 -
IC BLOCK DIAGRAM & DESCRIPTION
16-bit
Timer/Counter
Time Base
Timer
Watchdog
Timer
TC1
System Controller
Standby Controller
Timing Generator
High frequ.
Low frequ.
Clock
Generator
TC2
Interrupt Controller
8-bit
Timer/Counter
Data Memory
(RAM)
Data Memory
(EEPROM)
Program
Counter
8bit
AD converter
P5 P0 P4
I/O ports
V
AREF
I/O ports (Segment output)
Segment output Common output
P3 P4 PD
P2
Program Memory
TC3 TC5
Serial
Interfaces
SIO1 SIO2
Register banks
Stack Pointer
Flags RBS
PSW
LOD Driver
ALU
VDD
VSS
VLC
RESET
BOOT
TEST
XIN
XOUT
MROM
BOOT
Inst. Register
Inst. Decoder
EEPROM
P9 P6
P93/SEG12
to
P90/SEG15
COM3
to
COM0
P22 to P20
P57 to P50
(AIN7) to (AIN0)
P07 to P00
P17 to P10 P36 to P30 P47 to P40
PD2
to
PD0
SEG11
to
SEG0
P87/SEG32
to
P80/SEG39 P77/SEG24
to
P70/SEG31 P67/SEG16
to
P60/SEG23
P7 P8
IC651 TMP87EP26F-4K76 (Micro Controller)
Control Pin I/O Remarks
XIN
XOUT
XTIN
XTOUT
RESET
STOP/INTS
TEST
BOOT
Input
Output
Input
Output
I/O
Input
Input
Resonator connecting pins (high-frequency)
Rf=1.2M
Ω
(typ.)
Ro=1.5k
Ω
(typ.)
R=1k
Ω
(typ.)
Resonator connecting pins (low-frequency)
Rf=6M
Ω
(typ.)
Ro=220k
Ω
(typ.)
R=1k
Ω
(typ.)
Sink open drain output. Hysteresis input.
Pull-up resistor.
R
IN
=220k
Ω
(typ.)
R=1k
Ω
(typ.)
Hysteresis input.
R=1k
Ω
(typ.)
Pull-down resistor.
R
IN
=70k
Ω
(typ.)
R=1k
Ω
(typ.)
Control Pin I/O Remarks
P0
P5
P1
P3
P2
P6
P7
P8
P9
P4
PD
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Tri-state I/O.
R=1k
Ω
(typ.)
Tri-state I/O. Hysteresis input.
R=1k
Ω
(typ.)
Sink open drain output. Hysteresis input.
R=1k
Ω
(typ.)
Sink open drain output.
R=1k
Ω
(typ.)
Sink open drain
or
Segment output.
R=1k
Ω
(typ.)
Sink open drain or push-pull output.
P41 High current output. Hysteresis input.
Sink open drain output.
R=1k
Ω
(typ.)