si2401 Silicon Laboratories, si2401 Datasheet - Page 54

• Manufacturer Part Number: si2401
• Description: V.22bis Isomodem With Integrated Global Daa
• Manufacturer: Silicon Laboratories

Si2401
SE3 (GPD). GPIO Data
Reset settings N/A
SE4 (CF5). Chip Functions 5
Reset settings = xx00_0000 (0x00)
54
Bit
7:4
Bit
2:0
3
2
1
0
7
6
5
4
3
Name
Name
Type
Type
Bit
Bit
Reserved
Reserved
Reserved
Name
GPD4
GPD3
GPD2
GPD1
Name
NBCK
SBCK
GPE
DRT
NBCK
D7
D7
R
Read returns zero.
GPIO4 Data.
Data = 0
Data = 1
GPIO3 Data.
Data = 0
Data = 1
GPIO2 Data.
Data = 0
Data = 1
GPIO1 Data.
Data = 0
Data = 1
9600 Baud Clock (Read Only).
600 Baud Clock (Read Only).
Data Routing.
0 = Data mode, DSP output transmitted to line, line received by DSP input.
1 = Loopback mode, TXD through microcontroller (DSP) to RXD.
Read returns zero.
GPIO1 Enable.
0 = Disable.
1 = Enable GPIO1 to be HDLC end-of-frame flag.
Read returns zero.
SBCK
D6
D6
R
DRT
R/W
D5
D5
Rev. 1.0
D4
D4
Function
Function
GPD4
GPE
R/W
R/W
D3
D3
GPD3
R/W
D2
D2
GPD2
R/W
D1
D1
GPD1
R/W
D0
D0