Freescale Semiconductor, Inc.
Memory
EPROM
2.7 EPROM
The EPROM is located in two areas of the memory map:
• Addresses $0700–$1EFF contain 6144 bytes of user EPROM.
• Addresses $1FF0–$1FFF contain 16 bytes of EPROM reserved
for user vectors and COP and security register, and the mask
option register.
2.8 COP Re g iste r
As shown in Figure 2-6, a register location is provided at $1FF0 to set
1
the EPROM security , select the optional features, and reset the COP
watchdog timer. The OPT bit controls the function of the PB4 port pin
and the availability to add an offset to any measured analog voltages.
See 8.5 Analog Status Register for more information
$1FF0
Read:
Write:
Bit 7
6
5
4
3
2
1
Bit 0
EPMSEC
OPT
COPC
= Unimplemented
Figure 2-6. COP and Security Register (COPR)
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
copying the EPROM/OTPROM difficult for unauthorized users.
MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0
General Release Specification
Memory
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