DF2505BR26DV Renesas Electronics America, DF2505BR26DV Datasheet - Page 432

• Manufacturer Part Number: DF2505BR26DV
• Description: IC H8S/2505 MCU FLASH 176-LFBGA
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505BR26DV

• 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: 176-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 12 Watchdog Timer (WDT)
Notes: 1. Only 0 can be written, for flag clearing.
Rev. 6.00 Sep. 24, 2009 Page 384 of 928
REJ09B0099-0600
Bit
2
1
0
2. When the OVF flag is polled with the interval timer interrupt disabled, read the OVF bit
3. The overflow period is the time from when TCNT starts counting up from H'00 until
Bit Name
CKS2
CKS1
CKS0
while it is 1 at least twice.
overflow occurs.
Initial
Value
0
0
0
R/W
R/W
R/W
R/W
Description
Clock Select 2 to 0
These bits select the clock source to be input to TCNT.
The overflow frequency*
32.768 MHz is enclosed in parentheses.
When PSS = 0:
000: Clock φ/2 (frequency: 25.6 μs)
001: Clock φ/64 (frequency: 819.2 μs)
010: Clock φ/128 (frequency: 1.6 ms)
011: Clock φ/512 (frequency: 6.6 ms)
100: Clock φ/2048 (frequency: 26.2 ms)
101: Clock φ/8192 (frequency: 104.9 ms)
110: Clock φ/32768 (frequency: 419.4 ms)
111: Clock φ/131072 (frequency: 1.68 s)
When PSS = 1:
000: Clock φ
001: Clock φ
010: Clock φ
011: Clock φ
100: Clock φ
101: Clock φ
110: Clock φ
111: Clock φ
SUB
SUB
SUB
SUB
SUB
SUB
SUB
SUB
/2 (frequency: 15.6 ms)
/4 (frequency: 31.3 ms)
/8 (frequency: 62.5 ms)
/16 (frequency: 125 ms)
/32 (frequency: 250 ms)
/64 (frequency: 500 ms)
/128 (frequency: 1 s)
/256 (frequency: 2 s)
3
for φ = 20 MHz and φ
SUB
=