Nuvoton NuMicro MS51PC0AE - Page 426

MS51
Nov. 28, 2019 Page 426 of 491 Rev 1.00
MS51 32K SERIES TECHNICAL REFERENCE MANUAL
I2ADDR – I
2
C Own Slave Address
Register
SFR Address
Reset Value
I2ADDR
C1H, Page 0
0000_0000 b
7
6
5
4
3
2
1
0
I2ADDR[7:1]
GC
R/W
R/W
Bit
Name
Description
7:1
I2ADDR[7:1]
I
2
C device’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 I2ADDR[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.