HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 387

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

11.3.2
Figure 11.5 illustrates interval timer operation. To use the WDT as an interval timer, clear bit
WT/
TCNT overflow. This function can be used to generate interval timer interrupts at regular
intervals.
11.3.3
Figure 11.6 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.
H'FF
TCNT
count value
H'00
I T
to 0 and set bit TME to 1 in TCSR. An interval timer interrupt request is generated at each
TCNT
Overflow signal
OVF
Interval Timer Operation
Timing of Setting of Overflow Flag (OVF)
WT/
TME = 1
IT
= 0
Interval
timer
interrupt
Figure 11.5 Interval Timer Operation
Figure 11.6 Timing of Setting of OVF
H'FF
Interval
timer
interrupt
H'00
Interval
timer
interrupt
Rev. 2.00 Sep 20, 2005 page 347 of 800
Interval
timer
interrupt
Section 11 Watchdog Timer
REJ09B0260-0200
Time t