r5f21346mnfp Renesas Electronics Corporation., r5f21346mnfp Datasheet - Page 566

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r5f21346mnfp

Manufacturer Part Number
r5f21346mnfp
Description
Single-chip Mcus Incorporates The R8c Cpu Core
Manufacturer
Renesas Electronics Corporation.
Datasheet

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Part Number
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Part Number:
r5f21346mnfp#V0
Manufacturer:
Renesas Electronics America
Quantity:
10 000
R8C/34M Group
R01UH0131EJ0100 Rev.1.00
Jun 21, 2011
26.2.7
Notes:
1. When rewriting the SDAO bit, write 0 to the SDAOP bit simultaneously using the MOV instruction.
2. Do not write to the SDAO bit during a transfer operation.
3. Enabled in master mode. When writing to the BBSY bit, write 0 to the SCP bit simultaneously using the MOV
4. Disabled when the clock synchronous serial format is used.
5. When writing 0 to the ICE bit in the ICCR1 register or 1 to the IICRST bit during an I
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0199h
instruction. Execute the same way when a start condition is regenerated.
the BBSY bit and the STOP bit in the ICSR register may become undefined. Refer to 26.9 Notes on I
Interface .
Symbol
SDAOP SDAO write protect bit
Symbol
IICRST I
SDAO
Bit
SCLO
BBSY
SCP
IIC bus Control Register 2 (ICCR2)
BBSY
b7
0
Nothing is assigned. If necessary, set to 0. When read, the content is 1.
(5)
Nothing is assigned. If necessary, set to 0. When read, the content is 1.
SCL monitor flag
SDA output value control bit
Start/stop condition generation
disable bit
Bus busy bit
2
C bus control block reset bit
SCP
b6
1
Bit Name
(4. 5)
SDAO
b5
1
SDAOP
b4
1
When hang-up occurs due to communication failure during
I
block of the I
initializing registers.
0: SCL pin is set to “L”
1: SCL pin is set to “H”
When rewriting the SDAO bit, write 0 simultaneously
When read, the content is 1.
When read
0: SDA pin output is held “L”
1: SDA pin output is held “H”
When written
0: SDA pin output is changed to “L”
1: SDA pin output is changed to high-impedance
When writing to the to BBSY bit, write 0 simultaneously
When read, the content is 1.
Writing 1 is invalid.
When read:
0: Bus is released
1: Bus is occupied
When written
0: Stop condition generated
1: Start condition generated
2
C bus interface operation, writing 1 resets the control
(“H” output via external pull-up resistor)
(SDA signal changes from “L” to “H”
(SDA signal changes from “H” to “L”
while SCL signal is held “H”)
while SCL signal is held “H”)
SCLO
b3
1
2
C bus interface without setting ports or
(1, 2)
(3)
:
b2
1
Function
IICRST
b1
0
2
C bus interface operation,
b0
1
26. I
Page 534 of 740
2
C bus Interface
(1)
.
(3)
.
2
C bus
R/W
R/W
R/W
R/W
R/W
R/W
R

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