DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 492

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• 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: 128KB (128K 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: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

13.3.4
The WOVF flag is set to 1 if TCNT overflows during watchdog timer operation. At the same time, the WDTOVF signal*
goes low. If TCNT overflows while the RSTE bit in RSTCSR is set to 1, an internal reset signal is generated for the entire
H8S/2357 Group chip. Figure 13-7 shows the timing in this case.
Note: * The WDTOVF pin function is not available in the F-ZTAT version, the H8S/2398, H8S/2394, H8S/2392, or
13.4
During interval timer mode operation, an overflow generates an interval timer interrupt (WOVI). The interval timer
interrupt is requested whenever the OVF flag is set to 1 in TCSR.
Rev.6.00 Oct.28.2004 page 462 of 1016
REJ09B0138-0600H
H8S/2390.
Timing of Setting of Watchdog Timer Overflow Flag (WOVF)
Interrupts
Note: * The WDTOVF pin function is not available in the F-ZTAT version, the H8S/2398, H8S/2394, H8S/2392,
ø
TCNT
Overflow signal
(internal signal)
WOVF
WDTOVF signal*
Internal reset
signal
or H8S/2390.
Figure 13-7 Timing of Setting of WOVF
H'FF
132 states
H'00
518 states