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tam dela:
CIRCUIT DESCRIPTION
Pin No. | Pin name
VO
|
Name
Description
bi
Bee
nae
= .
@FL segment control pin.
29
P141
oven
Sagi
e Negative logic.
30
P140
Grain
Sa
© Drives the FL display through an inversion buffer.
31
NC
32
VDD
Power supply pin.
33
P33
1/0
Serial
e@ DATA pin for system serial communication
.
(CMOS)
DATA
@ Normally in input mode, and in output mode only when serial data is output.
1/0
Serial
@ BUSY pin for system serial communication
.
0
Output pin for the power relay control : Active high.
35
P31
(CMOS)
POWER
This is controlled by the POWER
key. It alternates between high (Power ON) and low
ese
(Power OFF) each time the POWER
key is pressed.
36
P30
.
TG
37
P43
2G
38
P42
3G
39
P41
fe)
4G
e FL digit control pin.
40
P40
(CMOS)
5G
e Negaitve logic.
41
» P53
6G
e Drives the FL display through an inversion buffer.
42
P52
7G
43
P51
8G
44
P50
9G
45
RESET
j
Input pin for the reset signal from the microcomputer .
"2
m2
@ System clock oscillator pin (4.194MHz) .
47
x1
48
P63
|
Sega, Key
49
P62
Seg b, Key
50
P61
Seg c, Key
51
P60
Seg d, Key
52
P73
Sege
53
P72
(@)
Seg f, Key
e@ FL segment control pin .
54
P71
(CMOS)
Seg g, Key
@ Negative logic,
55
P70
Seg k, Key
@ Drives the FL display through an inversion buffer.
56
P83
Seg i
e Key intake strobe signal output pin.
57
P82
Seg j, Key
58
P81
Seg k, Key
59
P80
Seg! , Key
60
P93
Seg m
61
P92
Seg n
62
P91
Seg o
63
P90
Seg p
64
Vss
| GND pin.
13
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