GMS81C2112 Datasheet, PDF (90/107 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C2112/GMS81C2120
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
RESET
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 21-2 Pin Assignment t
Pin No.
User Mode
Pin Name
Pin Name
EPROM MODE
Description
2
R53
CTL3
Read/Write Control
3
R54
CTL2
Address/Data Control
4
R55
CTL1
Write Control 1
5
R56
7
RESETB
CTL0
VPP
Write Control 0
Programming Power (0V, 12.75V)
8
XI
EPROM Enable High Active, Latch Address in falling edge
9
XO
NC
No connection
10
VSS
VSS
Connect to VSS (0V)
12
R60
A_D0
A8
A0
D0
13
R61
14
R62
A_D1
A_D2
Address Input
Data Input/Output
A9
A1
D1
A10
A2
D2
15
R63
A_D3
A11
A3
D3
16
R64
A_D4
A12
A4
D4
17
R65
18
R66
A_D5
A_D6
Address Input
Data Input/Output
A13
A5
D5
A14
A6
D6
19
R67
A_D7
A15
A7
D7
21
VDD
VDD
Connect to VDD (6.0V)
Table 21-1 Pin Description in EPROM Mode (GMS81C2120)
84
JUNE. 2001 Ver 1.00