HMS87C13042A Datasheet, PDF (73/88 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

HMS87C130XA/120XA/110XA
20. OTP PROGRAMMING
The HMS87C130XA is one-time PROM(OTP) microcon-
troller with 4K/2K bytes electrically programmable read
only memory.
20.1 DEVICE CONFIGURATION AREA
The Device Configuration Area can be programmed or left
unprogrammed to select device configuration such as secu-
rity bit, power on reset, RC-oscillation, PFD level select
and open drain port selection .
To programming the OTP device, user must use the uni-
versal programmer which is support Hynix microcontrol-
lers.
This area is not accessible during normal execution but is
readable and writable during program / verify.
CONFIG
Configuration Register
-
-
POREN OPDR1 OPDR0
LOCK
PFD
LEVEL ^RC_OPT
ADDRESS : 707FH
RC Otion
0 : Normal Oscillator
1 : External RC Oscillator
PFD Level Select
0 : PFD Level High (2.4~2.6V)
1 : PFD Level Low (1.6~1.8V)
SECURITY BIT
0 : Allow Code Read Out
1 : Prohibit Code Read Out
Open Drain Port Selection
00 : Normal Port
01 : Open Drain RA0
10 : Open Drain RA0/RB2
11 : Open Drain RA0/RB2/RB3/RC0
Power on RESET
0 : Power on RESET Disable
1 : Power on RESET Enable
Figure 20-1 Device Configuration Area
70
Apr. 2001 ver 1.0