HD6413007F20 Renesas Electronics America, HD6413007F20 Datasheet - Page 452

• Manufacturer Part Number: HD6413007F20
• Description: IC H8 MCU ROMLESS 5V 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD6413007F20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 35
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

12. Watchdog Timer
12.3.2
Figure 12.5 illustrates interval timer operation. To use the WDT as an interval timer, clear bit
WT/IT to 0 and set bit TME to 1 in TCSR. An interval timer interrupt request is generated at each
TCNT overflow. This function can be used to generate interval timer interrupts at regular
intervals.
12.3.3
Figure 12.6 shows the timing of setting of the OVF flag. The OVF flag is set to 1 when TCNT
overflows. At the same time, a reset signal is generated in watchdog timer operation, or an interval
timer interrupt is generated in interval timer operation.
Rev.5.00 Sep. 12, 2007 Page 422 of 764
REJ09B0396-0500
H'FF
TCNT
count value
H'00
φ
TCNT
Overflow signal
OVF
Interval Timer Operation
Timing of Setting of Overflow Flag (OVF)
WT/
TME = 1
IT
= 0
Interval
timer
interrupt
Figure 12.5 Interval Timer Operation
Figure 12.6 Timing of Setting of OVF
H'FF
Interval
timer
interrupt
H'00
Interval
timer
interrupt
Interval
timer
interrupt
Time t