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C8051F380/1/2/3/4/5/6/7/C
the incoming slave address. Additionally, if the GCn bit in register SMBnADR is set to 1, hardware will rec-
ognize the General Call Address (0x00). Table 22.4 shows some example parameter settings and the
slave addresses that will be recognized by hardware under those conditions.
Table 22.4. Hardware Address Recognition Examples (EHACK = 1)
Hardware Slave Address
SLVn[6:0]
Slave Address Mask
SLVMn[6:0]
GCn bit Slave Addresses Recognized by
Hardware
0x34
0x34
0x34
0x34
0x70
0x7F
0x7F
0x7E
0x7E
0x73
0
1
0
1
0
0x34
0x34, 0x00 (General Call)
0x34, 0x35
0x34, 0x35, 0x00 (General Call)
0x70, 0x74, 0x78, 0x7C
SFR Definition 22.6. SMB0ADR: SMBus0 Slave Address
Bit
7
6
5
4
3
2
1
0
Name
Type
SLV0[6:0]
R/W
GC0
R/W
Reset
0
0
0
0
0
0
0
0
SFR Address = 0xCF; SFR Page = 0
Bit Name
Function
7:1
0
218
SLV0[6:0]
GC0
SMBus Hardware Slave Address.
Defines the SMBus0 Slave Address(es) for automatic hardware acknowledge-
ment. Only address bits which have a 1 in the corresponding bit position in
SLVM0[6:0] are checked against the incoming address. This allows multiple
addresses to be recognized.
General Call Address Enable.
When hardware address recognition is enabled (EHACK0 = 1), this bit will deter-
mine whether the General Call Address (0x00) is also recognized by hardware.
0: General Call Address is ignored.
1: General Call Address is recognized.
Rev. 1.4
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