GMS81C1404 Datasheet, PDF (76/93 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C1404/GMS81C1408
22. OTP PROGRAMMING (GMS87C1404/GMS87C1408 only)
22.1 DEVICE CONFIGURATION AREA
The Device Configuration Area can be programmed or left
unprogrammed to select device configuration such as secu-
rity bit.
Ten memory locations (0F50_H ~ 0FE0_H) are designated as
Customer ID recording locations where the user can store
check-sum or other customer identification numbers.
This area is not accessible during normal execution but is
readable and writable during program / verify.
0F50_H
DEVICE
CONFIGURATION
AREA
0FF0H
ID
0F50_H
ID
0F60H
ID
0F70_H
ID
0F80_H
ID
0F90H
ID
0FA0_H
ID
0FB0_H
ID
0FC0H
ID
0FD0_H
ID
0FE0_H
CONFIG 0FF0_H
Configuration Register
CONFIG
----
-
LOCK
PFD
LEVEL
-
ADDRESS : 0FF0H
PFD Level Select
0 : PFD Level High (2.5~3.5V)
1 : PFD Level Low (2.0~3.0V)
SECURITY BIT
0 Allow Code Read Out
1 : Prohibit Code Read Out
Figure 22-1 Device Configuration Area
A_D4
A_D5
A_D6
A_D7
V_DD
CTL0
CTL1
CTL2
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
NC
10
19
11
18
12
17
13
16
14
15
Figure 22-2 Pin Assignment
A_D3
A_D2
A_D1
A_D0
V_SS
VPP
EPROM Enable
74
June. 2001 Ver 1.2