SI3015-FS Silicon Laboratories Inc, SI3015-FS Datasheet - Page 67

• Manufacturer Part Number: SI3015-FS
• Description: SI2400 ISOMODEM LINE-SIDE
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3015-FS

• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Baud Rates: -

SE4 (CF5). Chip Functions 5
Reset settings = 0000_0000b (0x00)
*Note: GPE and TRSP are mutually exclusive. Only one can be set at any one time, and they override the settings in registers
Name NBCK SBCK
Type
Bit
5:4
Bit
7
6
3
2
1
0
GPIO2 and GPIO1. Once TXD2 and RXD2 are enabled through TRSP = 1b, the primary serial port TXD and RXD no
longer function and pins TXD2 and RXD2 control the Si2400. This feature allows a second microcontroller to control
the Si2400.
Reserved
D7
R
TRSP*
Name
NBCK
SBCK
GPE*
APO
DRT
D6
R
9600 Baud Clock (Read Only).
600 Baud Clock (Read Only).
Data Routing (See Figure 10).
00 = Data mode, DSP output transmitted to line, line received by DSP input.
01 = Voice mode, selected AIN transmitted to line, line received by AOUT.
10 = Loopback mode, RXD through microcontroller (DSP) to TXD. AIN looped to AOUT.
11 = Codec mode, data from DSPOUT to AOUT, AIN to DSPIN.
GPIO1 Enable.
0 = Disable.
1 = Enable GPIO1 to be HDLC end-of-frame flag.
Read returns zero.
Analog Power On.
0 = Disable.
1 = Power on analog ADC and DAC.
TXD2/RXD2 Serial Port.
0 = Disable.
1 = Enable TXD2/RXD2 serial port so that RXD2 is GPIO1 and TXD2 is GPIO2.
D5
DRT
R/W
D4
GPE
R/W
D3
D2
Rev. 1.1
APO
R/W
D1
Function
TRSP
R/W
D0
Si2400
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