MC68HC708MP16 Datasheet, PDF (56/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

EPROM/OTPROM
4.4 EPROM/OTPROM Control Register
The EPROM control register controls EPROM/OTPROM programming.
Address: $FE07
$FE07 Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
0
0
0
0
ELAT
EPGM
Write:
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
Figure 4-1. EPROM/OTPROM Control Register (EPMCR)
ELAT — EPROM/OTPROM Latch Control Bit
This read/write bit latches the address and data buses for
programming the EPROM/OTPROM. Clearing ELAT also clears the
EPGM bit. EPROM/OTPROM data cannot be read when ELAT is set.
1 = Buses configured for EPROM/OTPROM programming
0 = Buses configured for normal operation
EPGM — EPROM/OTPROM Program Control Bit
This read/write bit applies the programming voltage from the
IRQ1/V_PP pin to the EPROM/OTPROM. To write to the EPGM bit, the
ELAT bit must be set already. Reset clears the EPGM bit.
1 = EPROM/OTPROM programming power switched on
0 = EPROM/OTPROM programming power switched off
Technical Data
56
EPROM/OTPROM
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor