DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 607

• 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: -

Table 17.7 List of System Clock Division Ratio
Bit
2
1
0
Bit 4
CKS1
0
0
1
1
Bit Name
LUEE
CKS0
⎯
Bit 1
CKS0
0
1
0
1
Initial
Value
0
0
0
R/W
R/W
R/W
⎯
Function
1/4 system clock is used (φ = 24MHz, 25.16 MHz)
1/3 system clock is used (φ = 18MHz, 18.87 MHz)
1/2 system clock is used (φ = 12MHz, 12.58 MHz)
Setting prohibited
Description
Last Byte Underrun Enable
Sets whether to generate an underrun error when the last
data field byte is transferred in data transmission.
If the IEB reads from IETBR when the TxRDY flag is set
(the transmit buffer register (IETBR) is empty), an underrun
error occurs. In transmission using the DTC, an underrun
error occurs at the last byte transmission if the CPU did not
clear the TxRDY flag, because the DTC does not clear the
TxRDY flag. When the DTC is used, set this bit to 0 to
mask an underrun error generated at the last byte
transmission. When the DTC is not used, set this bit to 1 to
generate an underrun error at the last byte transmission.
0: An underrun error does not occur at the last byte
1: An underrun error does not occur at the last byte
Input Clock Select
Selects clock used by the IEB. See table 17.7.
Reserved
This bit is always read as 0 and cannot be modified.
transmission (when using the DTC)
transmission (when not using the DTC)
Section 17 IEBus™ Controller (IEB) [H8S/2552 Group]
Rev. 6.00 Sep. 24, 2009 Page 559 of 928
REJ09B0099-0600