XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 184
XC68HC705JJ7
Manufacturer Part Number
XC68HC705JJ7
Description
MICROCONTROLLER
Manufacturer
Motorola
Datasheet
1.XC68HC705JJ7.pdf
(242 pages)
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EPROM/OTPROM
13.3 EPROM Registers
13.3.1 EPROM Programming Register
Advance Information
184
Address:
The EPROM programming register (EPROG) controls the actual
programming of the EPROM bytes and the mask option register (MOR).
The MOR controls eight mask options found on the read-only memory
(ROM) version of this microcontroller unit (MCU). There is an additional
EPROM bit (EPMSEC) located at the computer operating properly
(COP) address to provide EPROM array security.
The EPROM programming register (EPROG) shown in
contains the control bits for programming the EPROM. In normal
operation, the EPROM programming register contains all logic 0s.
EPGM — EPROM Programming Bit
MPGM — Mask Option Register (MOR) Programming Bit
Reset:
Read:
Write:
This read/write bit applies the voltage from the IRQ/V
EPROM. To write the EPGM bit, the ELAT bit must already be set.
Clearing the ELAT bit also clears the EPGM bit. Reset clears EPGM.
This read/write bit applies programming power from the IRQ/V
to the MOR. Reset clears MPGM.
1 = EPROM programming power switched on
0 = EPROM programming power switched off
1 = MOR programming power switched on
0 = MOR programming power switched off
Figure 13-1. EPROM Programming Register (EPROG)
$001C
Bit 7
0
0
= Unimplemented
EPROM/OTPROM
R
6
0
0
R
5
0
0
MC68HC705JJ7 • MC68HC705JP7 — REV 4
R
4
0
0
R
R
3
0
0
= Reserved for test
ELAT
2
0
Figure 13-1
PP
MPGM
1
0
pin to the
MOTOROLA
PP
EPGM
Bit 0
0
pin
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