DF3048X16V Renesas Electronics America, DF3048X16V Datasheet - Page 472

• Manufacturer Part Number: DF3048X16V
• Description: MCU 5V 128K,PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS 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. 7.00 Sep 21, 2005 page 446 of 878
REJ09B0259-0700
H'FF
TCNT
count value
H'00
Interval Timer Operation
Timing of Setting of Overflow Flag (OVF)
TCNT
Overflow signal
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