DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 461

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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.
H'FF
TCNT
count value
H'00
H'FF
TCNT count
value
H'00
Internal
reset signal
Interval Timer Operation
WT/
TME = 1
IT
= 0
Start
Interval
timer
interrupt
Figure 12.4 Watchdog Timer Operation
Figure 12.5 Interval Timer Operation
H'00 written
in TCNT
Interval
timer
interrupt
OVF = 1
Interval
timer
interrupt
WDT overflow
Rev. 3.00 Mar 21, 2006 page 431 of 814
Reset
518 states
TME set to 1
Interval
timer
interrupt
Section 12 Watchdog Timer
H'00 written
in TCNT
REJ09B0302-0300
Time t