CHAPTER 18 OPTION BYTE
Preliminary User’s Manual U19014EJ1V0UD
450
Here is an example of description of the software for setting the option bytes.
OPT CSEG
AT
0080H
OPTION: DB
70H
; Enables watchdog timer operation (illegal access detection operation),
; Window open period of watchdog timer: 100%,
; Overflow time of watchdog timer: 2
10
/f
RL
,
; Internal low-speed oscillator can be stopped by software.
DB
01H
; 2.7/1.59 V POC mode
DB
00H
; Reserved area
DB
00H
; Reserved area
DB
00H
; On-chip debug operation disabled
Remark
Referencing of the option byte is performed during reset processing. For the reset processing timing,
see
CHAPTER 15 RESET FUNCTION
.
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