MC908GR8CDWE Datasheet, PDF (129/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Freescale Semiconductor, Inc.
Technical Data — MC68HC908GR8
Section 8. Configuration Register (CONFIG)
8.1 Contents
8.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
8.3 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
8.2 Introduction
This section describes the configuration registers, CONFIG1 and
CONFIG2. The configuration registers enable or disable these options:
• Stop mode recovery time (32 CGMXCLK cycles or 4096
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 and voltage trip point
selection
• Enable/disable the oscillator (OSC) during stop mode
8.3 Functional Description
The configuration registers are used in the initialization of various
options. The configuration registers can be written once after each reset.
All of the configuration register bits are cleared 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
registers are located at $001E and $001F. The configuration register
may be read at anytime.
MC68HC908GR8 — Rev 4.0
MOTOROLA
Configuration Register (CONFIG)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
129