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IC BLOCK DIAGRAM & DESCRIPTION
Q1
Q2
1
5
2
3
4
IC472,881 KRX101U
(Switching Application
Interface Circuit and Driver
Circuit Application)
OUT
GND
V
DD
C
D
2
1
GND
1
V
DD
OUT
C
D
2
4
3
3
4
R
D
Vref
PIN No.
1
2
3
4
PIN NAME
GND
V
DD
C
D
OUT
FUNCTIONS
GND Pin
V
DD
Pin / Voltage Detect Pin
Capacitor Connect Pin with Delay
Reset Signal Output Pin
IC473,802 PST3627U(Monolithic IC)
Ciock generating
circuit
Watchdog
timer
R A M
R O N
A-D
converter
(10)
PWM
(8)
P4(5)
P3(5)
P2(8)
P1(8)
P0(8)
SI/O(8)
I C
2
Prescaler 12(8)
Prescaler X(8)
Prescaler Y(8)
Timer 1(8)
Timer 2(8)
Timer X(8)
Timer Y(8)
C P U
A
X
Y
S
PC
L
PS
PC
H
INT
0
-
INT
3
Reset
Sub-
clock
input
X
CIN
Sub-
clock
output
X
OUT
CNTR
0
CNTR
1
XCOUT
XCIN
18
15
1
21
20
19
2 3
4 5 6 7 8
9 10 11 12 13 14 16 17
38 39 40 41 42
22 23 24 25
27
29
30 31 32 33 34 35 36 37
28
26
X
IN
X
OUT
V
SS
V
CC
CNV
SS
RESET
P4
4
/INT
3
/PWM
P4
3
/INT
2
P4
2
/INT
1
P4
1
/INT
0
P4
0
/CNTR
1
V
REF
AV
SS
P2
7
/CNTR
0
/S
RD
Y
P2
6
/S
CLK
P2
5
/SCL
2
/T
X
D
P2
4
/SD
A
2
/R
X
D
P2
3
/SCL
1
P2
2
/SD
A
1
P2
1
/X
CIN
P2
0
/X
COUT
P3
0
/AN
0
P3
1
/AN
1
P3
2
/AN
2
P3
3
/AN
3
P3
4
/AN
4
P0
0
P0
1
P0
2
P0
3
P0
4
P0
5
P0
6
P0
7
P1
0
P1
1
P1
2
P1
3
/(LED
0
)
P1
4
/(LED
1
)
P1
5
/(LED
2
)
P1
6
/(LED
3
)
P1
7
/(LED
4
)
IC470 M38507M8-168FP(Op.Amp Micro Computer)