r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 491

• 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
21.2.6
Notes:
21.2.6.1
After Reset
1. All SFRs except the shift register, bits SCLO and SDAO, and bits BC0 to BC3 in the SIMR1 register.
2. When writing to the SDAO bit, write 0 to the SDAOP bit and write 0 to the SDAO bit simultaneously using the
3. Do not rewrite this bit in 4-wire bus communication mode.
4. For the data output after serial data transmission, the last bit value of the transmitted serial data is retained.
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 000E7h (SICR2_0)
In the SICR2 register, the bit functions differ depending on the SSU function and the I
MOV instruction.
If the content of the SDAO bit is rewritten before or after serial data transmission, the change is immediately
reflected in the data output until transfer starts. Do not write to the SDAO bit during data transfer.
Symbol
SDAOP SDAO write protect bit
Symbol
SIRST
SDAO
Bit
SCLO
BBSY
SCP
SI Control Register 2 (SICR2)
—
—
Preliminary document
Specifications in this document are tentative and subject to change.
SSU Function
BBSY
b7
0
Nothing is assigned. The write value must be 1. The read value is 1.
Control block reset bit
Nothing is assigned. The write value must be 1. The read value is 1.
Reserved
Serial data output value control bit
Reserved
SCP
b6
1
Bit Name
SDAO
b5
1
(2)
SDAOP
b4
1
(3)
When hang-up occurs due to communication failure
during operation, writing 1 initializes the control
block without setting ports or initializing registers
If 0 is written, the output level can be changed by
the SDAO bit.
Writing 1 has no effect. The read value is 1.
When this bit read, serial data output is monitored:
0: Serial data output is set to low
1: Serial data output is set to high
When written:
0: Data output is set to low
1: Data output is set to high
The write value is invalid.
SCLO
b3
1
b2
—
1
(2, 4)
21. Clock Synchronous Serial Interface
Function
SIRST
b1
0
2
b0
—
C bus function.
1
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(1)
.
R/W
R/W
R/W
R/W
R/W
—
—
R