UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 806

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

804
Here is an example of description of the software for setting the option bytes.
OPT
OPTION: DB
Remark Referencing of the option byte is performed during reset processing. For the reset processing timing,
see CHAPTER 21 RESET FUNCTION.
CSEG
DB
DB
DB
DB
AT 0080H
30H
00H
00H
00H
00H
; Enables watchdog timer operation (illegal access detection operation),
; Window open period of watchdog timer: 50%,
; Overflow time of watchdog timer: 2
; Internal low-speed oscillator can be stopped by software.
; LVI operation stop mode
; Reserved area
; Reserved area
; On-chip debug operation disabled
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 25 OPTION BYTE
10
/f
OSC
,