UPD78F1000GB-GAF-AX Renesas Electronics America, UPD78F1000GB-GAF-AX Datasheet - Page 546

• Manufacturer Part Number: UPD78F1000GB-GAF-AX
• Description: MCU 16BIT 78K0R/KX3-L 44-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3-Lr

Specifications of UPD78F1000GB-GAF-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Kx3-L
12.3 Register Controlling Watchdog Timer
R01UH0106EJ0300 Rev.3.00
Oct 01, 2010
The watchdog timer is controlled by the watchdog timer enable register (WDTE).
(1) Watchdog timer enable register (WDTE)
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 9AH or 1AH
Note The WDTE register reset value differs depending on the WDTON bit setting value of the option byte
Cautions 1. If a value other than “ACH” is written to the WDTE register, an internal reset signal is
Address: FFFABH
Symbol
WDTE
(000C0H). To operate watchdog timer, set the WDTON bit to 1.
2. If a 1-bit memory manipulation instruction is executed for the WDTE register, an internal reset
3. The value read from the WDTE register is 9AH/1AH (this differs from the written value (ACH)).
generated.
signal is generated.
0 (watchdog timer count operation disabled)
1 (watchdog timer count operation enabled)
7
Figure 12-2. Format of Watchdog Timer Enable Register (WDTE)
After reset: 9AH/1AH
WDTON Bit Setting Value
6
5
Note
R/W
4
Note
.
1AH
9AH
3
WDTE Register Reset Value
CHAPTER 12 WATCHDOG TIMER
2
1
0
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