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Chapter 1 Overview
1-6 Option
1-6-1 ROM Option
The product equipped with this LSI or an EPROM with this LSI controls the oscillation
mode after resetting as well as the runaway-detection watchdog timer, using bits 2 to
0 of the last address of the built-in ROM.
■ Option bits
Figure 1-6 ROM Option ( Address:X'7FFF' )
22
Option
01243
NSSTRT
Watchdog timer cycle setting
WDSEL2
WDSEL1WDSEL2
PKG
SEL1
PKG
SEL2
567
Selection of oscillation mode
after resetting
SLOW mode
NORMAL mode
NSSTRT
0
1
fs/2
0
1
WDSEL1
0
1
fs/2
fs/2
16
18
20
Packages
SDIP042-P-0600
QFP044-P-1010
PKGSEL2
0
1
QFH048-P-0707
PKGSEL1
0
1