GMS81C2020 Datasheet, PDF (86/92 Pages) Hynix Semiconductor – CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver

GMS81C2020/GMS81C2120
Hyundai Micro Electro nics
42PDIP
CTL3
CTL2
CTL1
CTL0
VPP
EPROM Enable
VSS
A_D0
A_D1
A_D2
A_D3
A_D4
A_D5
A_D6
A_D7
VDD
RA
1
R53
2
R54
3
R55
4
R56
5
R57
6
RESETB
7
XI
8
XO
9
VSS
10
AVSS
11
R60
12
R61
13
R62
14
R63
15
R64
16
R65
17
R66
18
R67
19
AVDD
20
VDD
21
42
R34
41
R33
40
R32
39
R31
38
R30
37
R27
36
R26
35
R25
34
R24
33
R23
32
R22
31
R21
30
R20
29
R07
28
R06
27
R05
26
R04
25
R03
24
R02
23
R01
22
R00
Figure 24-3 Pin Assignmen (42SDIP)t
Pin No.
2
3
4
5
7
8
9
10
12
13
14
15
16
17
18
19
21
User Mode
Pin Name
R53
R54
R55
R56
RESETB
XI
XO
VSS
R60
R61
R62
R63
R64
R65
R66
R67
VDD
EPROM MODE
Pin Name
Description
CTL3
Read/Write Control
P_Vb
CTL2
Address/Data Control
D_Ab
CTL1
Write 8Bytes Control
PGM8
CTL0
Write 4Bytes Control
PGM4
VPP
Programming Power (0V, 12.75V)
EPROM Enable High Active, Latch Address in falling edge
NC
No connection
VSS
Connect to VSS (0V)
A_D0
A8
A0
D0
A_D1
A_D2
Address Input
Data Input/Output
A9
A1
D1
A10
A2
D2
A_D3
A11
A3
D3
A_D4
A12
A4
D4
A_D5
A_D6
Address Input
Data Input/Output
A13
A5
D5
A14
A6
D6
A_D7
A15
A7
D7
VDD
Connect to VDD (6.0V)
Table 24-2 Pin Description in EPROM Mode (GMS81C2120)
86
preliminary
Nov. 1999 Ver 0.0