W83L951DG Datasheet, PDF (52/112 Pages) Winbond – Mobile Keyboard and Embedded Controller

W83L951DG/W83L951FG
6.4 System Management Bus Block
W83L951DG/FG provides 2 System Management Bus (SMBus) host controllers. The SMBus host
controllers is SMBUS 2.0 compatible. It also provides 32 bytes FIFO. The FIFO contains SMBus1
Master Data FIFO(8), SMBus2 Master Data FIFO(8).
Table 6-9 SMBus 1 Register Define
SMBUS 1 BLOCK(24)
INTADDR
NAME
7
6
5
4
3
2
1
0
B1
SM1SCR
Reserved
Baud Rate Select
RBIM Reserved Reserved
B2
SM1IREQ
MSTS MFIFORdy MFIFOReq MPktFinish
B3
SM1IE
Interrupt Enable [7:0]
B4
SM1FIFOCON STOP RepStart Master Level[1:0]
ClrMFIFO ClrSFIFO Slave Leve[1:0]
B5
SM1MFIFO Master Data FIFO [7:0]
B6
SM1MCON MasterEn RMS
Read Byte Count[5:0]
B7
SM1MSTS
RxTMO TxTMO
AlFull
AlEmty
WrErr
NACKRe ArbFail ClrFinish
B9
SM1MFIFOSTS Full
Empty FIFO Data Length[5:0]
BA
Reserved
BB
Reserved
BC
Reserved
BD
Reserved
Table 6-10 SMBus 2 Register Define
SMBUS 2 BLOCK(24)
INTADDR
NAME
7
6
5
4
3
2
1
0
C1
SM2SCR
Reserved
Baud Rate Select
RBIM Reserved Reserved
C2
SM2IREQ
MSI MFIFORdy MFIFOReq MPktFinish
C3
SM2IE
Interrupt Enable [7:0]
C4
SM2FIFOCON STOP RepStart
Master Level[1:0] ClrMFIFO ClrSFIFO
Slave Leve[1:0]
C5
SM2MFIFO
Master Data FIFO [7:0]
C6
SM2MCON MasterEn RMS
Read Byte Count[5:0]
C7
SM2MSTS RxTMO TxTMO AlFull
AlEmty
WrErr NACKRec ArbFail ClrFinish
C9
SM2MFIFOSTS Full
Empty
FIFO Data Length[5:0]
CA
Reserved
CB
Reserved
CC
Reserved
CD
Reserved
Gray: Only with System Reset to initial.
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