mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 69

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

5.1 Contents
5.2 Introduction
5.3 Functional Description
MC68HC08QA24
Freescale Semiconductor
Technical Data — MC68HC08QA24
5.2
5.3
5.4
This section describes use of mask options by custom-masked
read-only memory (ROM) and the mask option register (MOR) in the
MC68HC08QA24.
The mask options are hard-wired connections, specified at the same
time as the ROM code, which allow the user to customize the MCU. The
options control the enable or disable ability of these functions:
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or
copying the ROM data difficult for unauthorized users.
•
•
•
•
•
ROM security
Resets caused by the low-voltage inhibit (LVI) module
Power to the LVI module
Stop mode recovery time (32 CGMXCLK cycles or 4096
CGMXCLK cycles)
COP timeout period (2
CGMXCLK cycles)
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Mask Option Register
Mask Options
(1)
18
Section 5. Mask Options
–2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4
CGMXCLK cycles or 2
13
Technical Data
–2
4
67