W921E840A Datasheet, PDF (6/58 Pages) Winbond – 4-BIT MICROCONTROLLER

W921E840A/W921C840
3. PIN CONFIGURATIONS
40-pin DIP
21
W921E840A - 843A
/W921C840 - 843
1
PIN NAME
P2.0
P2.1
P2.2
P2.3
P3.0/ANI0
P3.1/ANI1
P3.2/ANI2
P3.3/ANI3
P4.0
P4.1
P4.2
P4.3/INT0
P5.0/TM1
P5.1/TM2
P5.2/VREF
P5.3/DAOUT
P6.0/WDATA
P6.1/WCLK
P6.2/RDATA
VSS
DIP40
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PIN NAME
P6.3/RCLK
PA.0
PA.1
PA.2
PA.3
PB.0
PB.1
PB.2
PB.3
PC.0 or BTG
PC.1
PC.2
PC.3
DTMF
PD.0 or XT
PD.1 or _XT
RESET
OSCO
OSCI
VDD
DIP40
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
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