DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 435

• Manufacturer Part Number: DF2505FC26V
• Description: IC H8S/2505 MCU FLASH 144QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505FC26V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.4.2
To use the WDT as an internal timer, set the WT/IT bit in TCSR to 0 and the TME bit to 1.
When the WDT is used as an interval timer, an interval timer interrupt (WOVI) is generated each
time the TCNT overflows. (The NMI interrupt request is not generated.) Therefore, an interrupt
can be generated at specified times.
Interval Timer Mode
Legend:
WT/IT:
TME:
WOVF:
Note: * In the case of WDT_0, the internal reset signal is generated only when the RSTE bit is set to 1.
Internal reset signal *
In the case of WDT_1, either the internal reset or the NMI interrupt is generated.
Timer mode select bit
Timer enable bit
Overflow flag
H'FF
H'00
TCNT value
Figure 12.2 Watchdog Timer Mode Operation
WT/IT = 1
TME = 1
Write H'00'
to TCNT
518 system clocks (WDT0)
515/516 system clocks (WDT1)
WOVF = 1
Overflow
Rev. 6.00 Sep. 24, 2009 Page 387 of 928
WT/IT = 1
TME = 1
Section 12 Watchdog Timer (WDT)
Write H'00'
to TCNT
REJ09B0099-0600
Time