DF2556FC20DV Renesas Electronics America, DF2556FC20DV Datasheet - Page 432
![IC H8S/2556 MCU FLASH 144QFP](/photos/12/29/122969/df2556fc20dv_sml.jpg)
DF2556FC20DV
Manufacturer Part Number
DF2556FC20DV
Description
IC H8S/2556 MCU FLASH 144QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2500r
Specifications of DF2556FC20DV
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, 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
144-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2556FC20DV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
DF2556FC20DV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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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
=
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