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ML51/ML54/ML56
Sep. 01, 2020
Page
191
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Rev 2.00
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TECHNI
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ML51/M
L54
/M
L56
Series
Tec
hnical Reference
Manual
I2CnADDRx
– I2Cn Own Slave Address
Register
SFR Address
Reset Value
I2C0ADDR0
C1H, Page 0
0000_0000 b
I2C0ADDR1
A1H, Page 2
0000_0000 b
I2C0ADDR2
A2H, Page 2
0000_0000 b
I2C0ADDR3
A3H, Page 2
0000_0000 b
I2C1ADDR0
B2H, Page 0
0000_0000 b
I2C1ADDR1
A4H, Page 2
0000_0000 b
I2C1ADDR2
A5H, Page 2
0000_0000 b
I2C1ADDR3
A6H, Page 2
0000_0000 b
7
6
5
4
3
2
1
0
I2CnADDRx[7:1]
GC
R/W
R/W
Bit
Name
Description
[7:1]
I2CnADDRx[7:1]
I2C0 D
evice’s Own Slave Address
In master mode:
These bits have no effect.
In slave mode:
These 7 bits define the slave address of this I
2
C device by user. The master should
address I
2
C device by sending the same address in the first byte data after a START
or a repeated START condition. If the AA flag is set, this I
2
C device will acknowledge
the master after receiving its own address and become an addressed slave.
Otherwise, the addressing from the master will be ignored.
Note that I2CnADDRx[7:1] should not remain its default value of all 0, because
address 0x00 is reserved for General Call.
[0]
GC
General Call Bit
In master mode:
This bit has no effect.
In slave mode:
0 = The General Call is always ignored.
1 = The General Call is recognized if AA flag is 1; otherwise, it is ignored if AA is 0.