r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 468

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
Figure 20.23
To transmission/reception
end processing
ABT = 0,
NACK
NABT = 0,
NACK
Preliminary document
Specifications in this document are tentative and subject to change.
Flow of Control 3 (Data Transmission/Reception Processing)
Wait for transmission interrupt
To arbitration end processing
Leave SCL2 and SDA2 open
Data transmission/reception
Wait for transmit interrupt
ABT and ACK data check
U2SMR4  01000000b
U2SMR2  01000011b
Transmission/reception
U2TB  XXh + NACK
(2) ACK determination
(2) ACK determination
(1) ABT determination
(1) ABT determination
start processing
U2TIC.IR = 1?
U2TIC.IR = 1?
Data write:
Transmission
ABT = 1
ABT = 0, ACK
Yes
Yes
ABT = 0,
ACK
Reception
ABT = 1
No
No
Set next data
No
Wait for transmission interrupt
Wait for transmit interrupt
(changes to operating register slave settings + to
U2TB  XXh + NACK
U2TB  XXh + ACK
Dummy data write:
Receive data read
flow of control after address comparison)
U2TIC.IR = 1?
U2TIC.IR = 1?
Is next final?
Slave address reception processing
Data write:
Yes
No
No
Wait for transmit interrupt
20. Serial Interface (UART2)
U2TB  XXh + ACK
Dummy data write:
Receive data read
U2TIC.IR = 1?
Yes
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No