HYUNDAI MicroElectronics
GMS81C2012/GMS81C2020
21. OTP PROGRAMMING
21.1 DEVICE CONFIGURATION AREA
The Device Configuration Area can be programmed or left
unprogrammed to select device configuration such as secu-
rity bit.
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.
Sixteen memory locations (7030H ~ 703FH) are designated
7030H
ID
ID
7030H
7031H
7032H
7033H
7034H
7035H
7036H
7037H
7038H
7039H
703AH
703BH
703CH
703DH
703EH
703FH
DEVICE
CONFIGURATION
AREA
ID
ID
703FH
ID
ID
ID
ID
ID
ID
ID
ID
ID
ID
ID
CONFIG
7
6
5
4
3
2
1
0
ADDRESS: 703FH
INITIAL VALUE: -000 -0-0B
R7X PFS1 PFS0
LOCK
RCO
CONFIG
External RC OSC Selection
0: Crystal or Resonator Oscillator
1: External RC Oscillator
Code Protect
0 : Allow Code Read Out
1 : Lock Code Read Out
PFD Level Selection
00: PFD = 2.7V
01: PFD = 2.7V
10: PFD = 3.0V
11: PFD = 2.4V
R74, R75 Port Selection
0 : Sub Clock
1 : R74, R75
Figure 21-1 Device Configuration Area
MAR. 2000 Ver 1.00
89
HYNIX [ HYNIX SEMICONDUCTOR ]
