HD64F3067RF20 Renesas Electronics America, HD64F3067RF20 Datasheet - Page 496

• Manufacturer Part Number: HD64F3067RF20
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3067RF20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 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
• Package: 100PQFP
• Family Name: H8
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16|32 Bit
• Number Of Programmable I/os: 70
• Interface Type: SCI
• On-chip Adc: 8-chx10-bit
• On-chip Dac: 2-chx8-bit
• Number Of Timers: 7
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 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.
Rev. 4.00 Jan 26, 2006 page 472 of 938
REJ09B0276-0400
H'FF
TCNT
count value
H'00
H'FF
TCNT count
value
H'00
Internal
reset signal
RESO
Interval Timer Operation
WT/
TME = 1
IT
= 0
Figure 12.4 Operation in Watchdog Timer Mode
Start
Interval
timer
interrupt
Figure 12.5 Interval Timer Operation
H'00 written
in TCNT
Interval
timer
interrupt
OVF = 1
Interval
timer
interrupt
WDT overflow
132 states
Reset
518 states
TME set to 1
Interval
timer
interrupt
H'00 written
in TCNT
Time t