36
417-DCM370E3-378
MNA342
1A
1Y
1
2
2A
2Y
3
4
3A
3Y
5
6
4A
4Y
9
8
5A
5Y
11
10
6A
6Y
13
12
74HC04
IC109 :
IC110 :
P
1
.4
/S
PWM1
P
1
.3
/S
PW
M
0
P1
.2
P1.1/T2EX
P1
.0
/T2
P4.
2
VDD
P0
.0/
A
D0
P0.2/AD2
P0
.3
/AD3
P0
.1/AD1
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
#EA
P4.1
ALE
#PSEN
P2.7/A15
P2.6/A14
P2.5/A13
SPWM2/P1.5
SPWM3/P1.6
SPWM4/P1.7
RES
RXD/P3.0
P4.3
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
SM8958A
44L PLCC
(Top View)
6
5
4
3
2
1 44 43 42 41 40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
#W
R/
P3
.6
#
R
D/
P3
.7
XT
AL2
XT
AL1
V
S
S
P4
.0
A
8
/P
2
.0
A
9
/P
2.1
A1
0/
P2
.2
A1
1/
P2
.3
A1
2/
P2
.4
ihhJ
Timer 2
Timer 1
Timer 0
Stack
Pointer
Decoder &
Register
1024 bytes
RAM
Reset
Circuit
Power
Circuit
Interrupt
Circuit
Timing
Generator
XTAL2
XTAL1
#EA
ALE
#PSEN
RES
Vdd
Vss
to pertinent blocks
to whole chip
to pertinent blocks
to whole system
Acc
Buffer2
Buffer1
ALU
PSW
Buffer
DPTR
PC
Incrementer
Program
Counter
Register
Port 1
Latch
Port 2
Latch
Port 3
Latch
Port 4
Latch
Port 2
Port 3
Driver & Mux
Port 4
Driver & Mux
8
8
8
4
WDT
Instruction
Register
Port 0
Latch
8
Port 1
Driver & Mux
Driver & Mux
Port 0
Driver & Mux
SPWM
32K
bytes
Flash
Memory
0000H
7FFFH
5
IC111 :
Vref
VOUT
VCC
GND
417-HDJ2000-503
BD4745G