DF2552BR26DV Renesas Electronics America, DF2552BR26DV Datasheet - Page 429

• 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: -

Notes: 1. Only 0 can be written for flag clearing.
Bit
6
5
4, 3
2
1
0
Bit Name
WT/IT
TME
⎯
CKS2
CKS1
CKS0
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 an
while it is 1 at least twice.
overflow occurs.
Initial
Value
0
0
All 1
0
0
0
R/W
R/W
R/W
⎯
R/W
R/W
R/W
0: Interval timer mode (the interval timer interrupt (WOVI)
Description
Timer Mode Select
Selects whether the WDT is used as a watchdog timer or
interval timer.
1: Watchdog timer mode (internal reset selectable)
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.
Reserved
These bits are always read as 1 and cannot be modified.
Clock Select 0 to 2
These bits select the clock source to be input to TCNT.
The overflow frequency*
parentheses.
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)
request to the CPU)
Rev. 6.00 Sep. 24, 2009 Page 381 of 928
3
for φ = 20 MHz is enclosed in
Section 12 Watchdog Timer (WDT)
REJ09B0099-0600