HD64F3048BF25 Renesas Electronics America, HD64F3048BF25 Datasheet - Page 478

• Manufacturer Part Number: HD64F3048BF25
• Description: IC H8 MCU FLASH 128K 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3048BF25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 8MHz
• 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
• 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.
12.3.3
Figure 12.6 shows the timing of setting of the OVF flag in TCSR. 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. 3.00 Sep 27, 2006 page 450 of 872
REJ09B0325-0300
H'FF
TCNT
count value
H'00
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