r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 437

• 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
20.2.9
Notes:
SCLHI Bit (SCL output stop enable bit)
SWC9 Bit (SCL wait bit 3)
After Reset
1. This bit is set to 0 when each condition is generated.
2. Can only be set when using as master in I
3. Can only be set in I
4. Can only be set when using as slave in I
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 000D4h
Write to the U2SMR4 register using the MOV instruction.
This function is used to release SCL2 output when the BBS bit (bus busy flag) in the U2SMR register is 0 (stop
condition detected) when an error occurs in I
When the SWC9 bit is set to 1, output of the SCL2 pin is held low at the rising edge of the clock after the 9th bit
of the clock. For details, refer to 20.3.3.9 (3) SCL2 Pin Low Output Hold Function 3.
Symbol
RSTAREQ Restart condition generate bit
STSPSEL SCL and SDA output select bit
STAREQ
STPREQ
Bit
Symbol
SCLHI
SWC9
ACKD
ACKC
UART2 Special Mode Register 4 (U2SMR4)
SWC9
Preliminary document
Specifications in this document are tentative and subject to change.
b7
0
Start condition generate bit
Stop condition generate bit
ACK data bit
ACK data output enable bit
SCL output stop enable bit
(2)
SCL wait bit 3
(4)
2
C mode. In other modes, set to 0.
SCLHI
b6
0
(3)
Bit Name
ACKC
b5
0
2
C mode. In other modes, set to 0.
2
ACKD
C mode. In other modes, set to 0.
(1, 2)
(1, 2)
(3)
b4
2
0
C mode.
(1, 2)
(2)
STSPSEL STPREQ RSTAREQ STAREQ
b3
0: Clear
1: Start
0: Start and stop conditions not output
1: Start and stop conditions output
0: ACK
1: NACK
0: Serial interface data output
1: ACK data output
0: Normal operation
1: SCL2 output forced stop
0: SCL2 pin low output hold disabled
1: SCL2 pin low output hold enabled
0
b2
0
Function
b1
0
20. Serial Interface (UART2)
b0
0
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