mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 39

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3
Configuration Registers (CONFIG)
3.1 Introduction
This section describes the configuration registers, CONFIG1 and CONFIG2. The configuration registers
enable or disable these options:
3.2 Functional Description
The configuration registers are used in the initialization of various options. The configuration register
(CONFIG1) can be written once after each reset but CONFIG2 register can perform multiple write. 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 $001D and $001F. The configuration registers may be read at anytime.
Freescale Semiconductor
† One-time writable register after each reset.
$001D
$001F
Addr.
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•
•
•
•
•
•
•
•
Computer operating properly module (COP)
COP timeout period (262,128 or 8176 CGMRCLK cycles)
Low-voltage inhibit (LVI) module power
LVI module reset
LVI module in stop mode
LVI module voltage trip point selection
STOP instruction
Stop mode recovery time (32 CGMXCLK cycles or 4096 CGMXCLK cycles)
Oscillator during stop mode
Configuration Register 2
Configuration Register 1
Register Name
(CONFIG1)
(CONFIG2)
†
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 3-1. CONFIG Registers Summary
COPRS
Bit 7
MC68HC908JW32 Data Sheet, Rev. 5
0
0
= Unimplemented
LVISTOP
6
0
0
LVIRSTD
XCLKEN
STOP_
5
0
0
STOP_RC
LVIPWRD
CLKEN
4
0
0
3
0
0
SSREC
R
2
0
0
VREG33D
STOP
1
0
0
URSTD
COPD
Bit 0
0
0
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