DF61654N50FTV Renesas Electronics America, DF61654N50FTV Datasheet - Page 581

• Manufacturer Part Number: DF61654N50FTV
• Description: IC H8SX/1654 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61654N50FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 75
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• For Use With: HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS 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.
Figure 13.1 shows a block diagram of the WDT.
13.1
• Selectable from eight counter input clocks
• Switchable between watchdog timer mode and interval timer mode
 In watchdog timer mode
 In interval timer mode
If the counter overflows, the WDT outputs WDTOVF. It is possible to select whether or
not the entire LSI is reset at the same time.
If the counter overflows, the WDT generates an interval timer interrupt (WOVI).
Features
Section 13 Watchdog Timer (WDT)
Rev.1.00 Sep. 08, 2005 Page 531 of 966
Section 13 Watchdog Timer (WDT)
REJ09B0219-0100