mc68hc908ap8a Freescale Semiconductor, Inc, mc68hc908ap8a Datasheet - Page 49

• Manufacturer Part Number: mc68hc908ap8a
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3
Configuration & Mask Option Registers (CONFIG & MOR)
3.1 Introduction
This section describes the configuration registers, CONFIG1 and CONFIG2; and the mask option
register, MOR.
The configuration registers enable or disable these options:
The mask option register selects one of the following oscillator options:
Freescale Semiconductor
$001D
$001F
$FFCF
† One-time writable register after each reset.
#
Addr.
MOR is a non-volatile FLASH register; write by programming.
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Computer operating properly module (COP)
COP timeout period (262,128 or 8176 ICLK cycles)
Low-voltage inhibit (LVI) on V
LVI on V
LVI module reset
LVI module in stop mode
STOP instruction
Stop mode recovery time (32 ICLK or 4096 ICLK cycles)
Oscillator (internal, RC, and crystal) during stop mode
Serial communications interface clock source (CGMXCLK or f
Internal oscillator
RC oscillator
Crystal oscillator
Configuration Register 2
Configuration Register 1
Register Name
Mask-Option-Register
REG
(CONFIG2)
(CONFIG1)
(MOR)
Figure 3-1. CONFIG and MOR Registers Summary
†
†
#
Erased:
Reset:
Reset:
Read:
Write:
Read:
Write:
Read:
Write:
MC68HC908AP A-Family Data Sheet, Rev. 3
OSCSEL1 OSCSEL0
ICLKDIS
COPRS
STOP_
Bit 7
DD
0
0
1
= Unimplemented
LVISTOP
RCLKEN
STOP_
6
0
0
1
LVIRSTD
XCLKEN
STOP_
R
5
0
0
1
OSCCLK1 OSCCLK0
LVIPWRD
R
4
0
0
1
BUS
LVIREGD
R
R
)
3
0
0
1
= Reserved
SSREC
R
2
0
0
0
1
STOP
R
1
0
0
0
1
SCIBDSRC
COPD
Bit 0
R
0
0
1
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