8381 N/B Maintenance
5.2 VIA VT8372 North Bridge with S3 ProSavage8 AGP8X
SMB /I2C Interface
Signal Name Pin # I/O Signal Description
SPCLK[2:1] C6,F7 IO Serial Port (SMB/I2C)Clocks.These are the clocks for
serial data transfer. SPCLK1 is typically used for I 2 C
com unications.As an output,it is program ed via
CRA0[0]. As an input,its status is read via CRA0[2].In
either case the serial port ust be enabled by
CRA0[4]=1.SPCLK2 is typically used for DDC onitor
com unications.As an output,it is program ed via
CRB1[0].As an input,its status is read via CRB1[2].The
port is enabled via CRB1[4]=1.
SPDAT[2 :1] D6,D7 IO Serial Port (SMB/I2C)Data.These are the data signals
used for serial data transfer.SPDAT1 is typically used for
2
IC com unications.As an output,it is program ed via
CRA0[1].As an input,its status is read via CRA0[3].In
either case the serial port ust be enabled by CRA0[4]=1.
SPDAT2 is typically used for DDC monitor
communications. As an output,it is program ed via
CRB1[1]. As an input,its status is read via CRB1[3].The
port is enabled via CRB1[4]=1.
101 |
ACEC
