GMS81C2020/GMS81C2120
Hyundai Micro Electronics
24. OTP PROGRAMMING
24.1 DEVICE CONFIGURATION AREA
The Device Configuration Area can be programmed or left
unprogrammed to select device configuration such as secu-
rity bit.
ed 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 designat-
7030
H
ID
ID
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
H
H
H
H
H
H
H
H
H
H
DEVICE
CONFIGURATION
AREA
ID
ID
703F
H
ID
ID
ID
ID
ID
ID
ID
703A
703B
H
H
ID
ID
703C
703D
H
H
H
H
ID
ID
703E
CONFIG
703F
Configuration Register
CONFIG
SXB / R7
PFD1
PFD0
EXTERNAL
RCOSC
CODE
PROTECT
ADDRESS :703FH
EXTERNAL RCOSC
-
-
-
0 : Crystal Oscillator
1 : External RC Oscillator
PFD LEVEL SELECTION
0 0 : PFD1 = 2.7V
0 1 : PFD1 = 2.7V
1 0 : PFD2 = 3.0V
1 1 : PFD3 = 2.4V
SXB / R7
CODE PROTECT
0 : SUB CLOCK
1 : R74, R75
0 : ALLOW CODE READ OUT
1 : LOCK CODE READ OUT
Figure 24-1 Device Configuration Area
84
preliminary
Nov. 1999 Ver 0.0
HYNIX [ HYNIX SEMICONDUCTOR ]
