DF2552BR26DV Renesas Electronics America, DF2552BR26DV Datasheet - Page 430

• Manufacturer Part Number: DF2552BR26DV
• Description: IC H8S/2552 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2552BR26DV

• 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: 512KB (512K 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: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 12 Watchdog Timer (WDT)
• TCSR_1
Rev. 6.00 Sep. 24, 2009 Page 382 of 928
REJ09B0099-0600
Bit
7
6
5
Bit Name
OVF
WT/IT
TME
Initial
Value
0
0
0
R/W
R/(W)*
R/W
R/W
1
0: Interval timer mode (the interval timer interrupt (WOVI)
1: Watchdog timer mode (a power-on reset or the NMI
Description
Overflow Flag
Indicates that TCNT has overflowed. Only a 0 can be
written to this bit, to clear the flag.
[Setting condition]
When TCNT overflows (changes from H'FF to H'00).
However, when internal reset request generation is
selected in watchdog timer mode, OVF is cleared
automatically by the internal reset.
[Clearing condition]
Cleared by reading TCSR*
to OVF
Timer Mode Select
Selects whether the WDT is used as a watchdog timer or
interval timer.
Timer Enable
When this bit is set to 1, TCNT starts counting. When this
bit is cleared, TCNT stops counting and is initialized to
H'00.
request to the CPU)
interrupt request to the CPU)
2
when OVF = 1, then writing 0