UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 383

• Manufacturer Part Number: UPD78F1506GF-GAT-AX
• Description: MCU 16BIT 78K0R/LX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Lx3r

Specifications of UPD78F1506GF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 78
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Lx3
8.3 Register Controlling Watchdog Timer
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
The watchdog timer is controlled by the watchdog timer enable register (WDTE).
(1) Watchdog timer enable register (WDTE)
Writing “ACH” to WDTE 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 reset value differs depending on the WDTON setting value of the option byte (000C0H). To
Cautions 1. If a value other than “ACH” is written to WDTE, an internal reset signal is generated.
Address: FFFABH
Symbol
WDTE
operate watchdog timer, set WDTON to 1.
2. If a 1-bit memory manipulation instruction is executed for WDTE, an internal reset signal is
3. The value read from WDTE is 9AH/1AH (this differs from the written value (ACH)).
generated.
0 (watchdog timer count operation disabled)
1 (watchdog timer count operation enabled)
7
Figure 8-2. Format of Watchdog Timer Enable Register (WDTE)
After reset: 9AH/1AH
WDTON Setting Value
6
5
Note
R/W
4
Note
.
1AH
9AH
3
WDTE Reset Value
CHAPTER 8 WATCHDOG TIMER
2
1
0
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