MC68HC908RK2 Datasheet, PDF (145/232 Pages) Motorola, Inc – Microcontroller Unit

Advance Information — MC68HC908RK2
Section 9. Configuration Register (CONFIG)
9.1 Contents
9.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
9.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
9.2 Introduction
This section describes the configuration register (CONFIG). The
configuration register enables or disables these options:
• Stop mode recovery time (32 CGMXCLK cycles or 4,096
CGMXCLK cycles)
• COP timeout period (2¹⁸ – 2⁴ or 2¹³ – 2⁴ CGMXCLK cycles)
• STOP instruction
• Computer operating properly module (COP)
• Low-voltage inhibit (LVI) module control
9.3 Functional Description
The CONFIG register is used in the initialization of various options and
can be written once after each reset. The register is set to the
documented value during reset. Since the various options affect the
operation of the MCU, it is recommended that these registers be written
immediately after reset. The configuration register is located at $001F.
NOTE:
On a FLASH device, the options are one-time writable by the user after
each reset. The CONFIG register is not in the FLASH memory but is a
special register containing one-time writable latches after each reset.
MC68HC908RK2 — Rev. 4.0
MOTOROLA
Configuration Register (CONFIG)
Advance Information
145