HMS87C1808B Datasheet, PDF (84/99 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

HMS87C1X04B/08B/16B
22. OTP PROGRAMMING
22.1 EPROM Mode
Mode
Program
Write
Verify
Read
Pin Description
A_D7~A_D0
CTL0
CTL1
CTL2
EPROM
Enable
V_PP
V_DD
High Addr.
(A15~A8)
0
0
0
H
11.5V 5.0V
Low Addr.
(A7~A0)
0
0
1
H
11.5V 5.0V
Data In
(D7~D0)
0
1
1
H
11.5V 5.0V
Data Out
(D7~D0)
0
1
0
H
11.5V 5.0V
High Addr.
(A15~A8)
0
0
0
H
11.5V 5.0V
Low Addr.
(A7~A0)
0
0
1
H
11.5V 5.0V
Data Out
(D7~D0)
0
1
0
H
11.5V 5.0V
Table 22-1 Description of EPROM mode
A_D4
A_D5
A_D6
A_D7
V_DD
CTL0
CTL1
CTL2
1
28
A_D3
2
27
A_D2
3
26
A_D1
4
25
A_D0
5
24
6
23
7
22
V_SS
8
21
V_PP
9
20 ^NC
10
19
EPROM Enable
11
18
12
17
13
16
14
15
Remarks
Figure 22-1 Pin Assignment
80
SEP. 2004 Ver 1.03