HD64F2676VFC33 Renesas Electronics America, HD64F2676VFC33 Datasheet - Page 701

• Manufacturer Part Number: HD64F2676VFC33
• Description: IC H8S MCU FLASH 256K 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2676VFC33

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: IrDA, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 103
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

The watchdog timer (WDT) is an 8-bit timer that outputs an overflow signal (WDTOVF) if a
system crash prevents the CPU from writing to the timer counter, thus allowing it to overflow.
At the same time, the WDT can also generate an internal reset signal.
When this watchdog function is not needed, the WDT can be used as an interval timer. In interval
timer operation, an interval timer interrupt is generated each time the counter overflows.
The block diagram of the WDT is shown in figure 14.1.
14.1
In watchdog timer mode
In interval timer mode
WDT0101A_010020020400
Selectable from eight counter input clocks
Switchable between watchdog timer mode and interval timer mode
If the counter overflows, the WDT outputs WDTOVF. It is possible to select whether or not
the entire chip is reset at the same time.
If the counter overflows, the WDT generates an interval timer interrupt (WOVI).
Features
Section 14 Watchdog Timer
Rev. 3.00 Mar 17, 2006 page 649 of 926
Section 14 Watchdog Timer
REJ09B0283-0300