Renesas RL78/F13 User Manual

RL78/F13, F14 CHAPTER 11 WATCHDOG TIMER
R01UH0368EJ0210 Rev.2.10 695
Dec 10, 2015
11.3 Register Controlling Watchdog Timer
The watchdog timer is controlled by the watchdog timer enable register (WDTE).
11.3.1 Watchdog timer enable register (WDTE)
When the WDTON bit in the option byte (000C0H) is 1, writing ACH to the WDTE register clears the watchdog timer
counter and starts counting again.
This register can be set by an 8-bit memory manipulation instruction.
Reset signal generation sets this register to 1AH or 9AH
Note
.
Figure 11-2. Format of Watchdog Timer Enable Register (WDTE)
Note The WDTE register reset value differs depending on the WDTON bit setting value of the option byte (000C0H).
To operate watchdog timer, set the WDTON bit to 1.
WDTON Bit Setting Value WDTE Register Reset Value
0 (watchdog timer count operation disabled) 1AH
1 (watchdog timer count operation enabled) 9AH
Cautions 1. When the WDTON bit in the option byte (000C0H) is 1, if a value other than “ACH” is written to
the WDTE register, an internal reset signal is generated.
2. When the WDTON bit in the option byte (000C0H) is 1, if a 1-bit memory manipulation
instruction is executed for the WDTE register, an internal reset signal is generated.
3. The value read from the WDTE register is 1AH/9AH (this differs from the written value (ACH) as
specified in the WDTON bit of the option byte (000C0H)).
01234567
Symbol
WDTE
Address: FFFABH After reset: 1AH/9AH
Note
R/W

Renesas RL78/F13 Specifications

General

Brand	Renesas
Model	RL78/F13
Category	Computer Hardware
Language	English