MC68HC705C4ACB MOTOROLA [Motorola, Inc], MC68HC705C4ACB Datasheet - Page 23

• Manufacturer Part Number: MC68HC705C4ACB
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

1.4 Programmable Options
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
MOTOROLA
Address:
These options are programmable in the mask option registers:
These options are programmable in the option register (shown in
Figure
SEC — Security Bit
1. No security feature is absolutely secure. However, Motorola’s strategy is to make reading or
Reset:
Read:
Write:
copying the PROM difficult for unauthorized users.
•
•
•
•
This bit is implemented as an EPROM cell and is not affected by
reset.
1 = Bootloader disabled; MCU operates only in single-chip mode.
0 = Security off; bootloader can be enabled.
Enabling of port B pullup devices (see
Register
Enabling of non-programmable COP watchdog (see
Option Register
PROM security
External interrupt sensitivity
*Implemented as an EPROM cell
1-1):
$1FDF
Bit 7
0
0
= Unimplemented
Figure 1-1. Option Register (Option)
General Description
1)
6
0
0
(1)
2)
5
0
0
U = Unaffected
4
0
0
SEC
3
*
*
9.5.2 Mask Option
U
2
Programmable Options
General Description
IRQ
9.5.3 Mask
1
1
Technical Data
Bit 0
0
0
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