HD64F2134FA20 Renesas Electronics America, HD64F2134FA20 Datasheet - Page 438

• Manufacturer Part Number: HD64F2134FA20
• Description: IC H8S MCU FLASH 128K 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of HD64F2134FA20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 58
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 14 Watchdog Timer (WDT)
14.3.2
To use the WDT as an interval timer, clear the WT/IT bit in TCSR to 0 and set the TME bit to 1.
An interval timer interrupt (WOVI) is generated each time TCNT overflows, provided that the
WDT is operating as an interval timer, as shown in figure 14.4. This function can be used to
generate interrupt requests at regular intervals.
Rev. 4.00 Jun 06, 2006 page 382 of 1004
REJ09B0301-0400
Legend:
WT/IT: Timer mode select bit
TME:
OVF:
Note: * Cleared to 0 by an internal reset when OVF is set to 1. XRST is cleared to 0.
Internal reset signal
Interval Timer Operation
Timer enable bit
Overflow flag
H'FF
H'00
TCNT value
WT/IT = 1
TME = 1
Figure 14.3 Operation in Watchdog Timer Mode
H'00 written
to TCNT
518 system clock periods
Overflow
OVF = 1 *
WT/IT = 1
TME = 1
H'00 written
to TCNT
Time