DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 630

• 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: -

Section 17 IEBus™ Controller (IEB) [H8S/2552 Group]
Rev. 6.00 Sep. 24, 2009 Page 582 of 928
REJ09B0099-0600
Bit
1
0
Bit Name
RO
ACK
Initial
Value
0
0
R/W
R/W
R/W
Description
Overflow of Maximum Number of Transmit Bytes in One
Frame
Indicates that the maximum number of bytes defined by
communications mode have been transmitted because a
NAK has been received from the receive unit and retransmit
has been performed, or that transmission has not been
completed because the message length value exceeds the
maximum number of transmit bytes in one frame. The IEB
sets the TxE flag and enters the wait state.
[Setting condition]
•
[Clearing condition]
•
Acknowledge bit Status
Indicates the data received in the acknowledge bit of the
data field.
•
•
Note: This flag is invalid in broadcast communications.
[Setting condition]
•
[Clearing condition]
•
When the transmit has not been completed although the
maximum number of bytes defined by communications
mode have been transmitted
When writing 0 after reading RO = 1
Acknowledge bit other than in the data field
The IEB terminates the transmission and enters the wait
state if a NAK is received. In this case, this bit and the
TxE flag are set to 1.
Acknowledge bit in the data field
The IEB retransmits data up to the maximum number of
bytes defined by communications mode until an ACK is
received from the receive unit if a NAK is received from
the receive unit during data field transmission. In this
case, when an ACK is received from the receive unit
during retransmission, this flag is not set and
transmission will be continued. When transmission is
terminated without receiving an ACK, this flag is set to 1.
When the acknowledge bit of 1 (NAK) is detected
When writing 0 after reading ACK = 1