DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 491

• Manufacturer Part Number: DF2398TE20
• Description: IC H8S MCU FLASH 256K 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K 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: 120-TQFP, 120-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2398TE20; HD64F2398TE20

13.3.2
To use the WDT as an interval timer, clear the WT/IT bit in TCSR to 0 and set the TME bit to 1. An interval timer
interrupt (WOVI) is generated each time TCNT overflows, provided that the WDT is operating as an interval timer, as
shown in figure 13-5. This function can be used to generate interrupt requests at regular intervals.
13.3.3
The OVF flag is set to 1 if TCNT overflows during interval timer operation. At the same time, an interval timer interrupt
(WOVI) is requested. This timing is shown in figure 13-6.
Interval Timer Operation
Timing of Setting Overflow Flag (OVF)
Overflow signal
(internal signal)
ø
OVF
TCNT
Legend:
WOVI: Interval timer interrupt request generation
H'FF
H'00
TCNT count
WT/IT=0
TME=1
Figure 13-5 Interval Timer Operation
Figure 13-6 Timing of Setting of OVF
Overflow
WOVI
H'FF
Overflow
WOVI
Overflow
WOVI
Rev.6.00 Oct.28.2004 page 461 of 1016
H'00
Overflow
WOVI
Time
REJ09B0138-0600H