SI3015-KS Silicon Laboratories Inc, SI3015-KS Datasheet - Page 15

• Manufacturer Part Number: SI3015-KS
• Description: IC SI2400 LINE-SIDE DAA 16SOIC
• Manufacturer: Silicon Laboratories Inc
• Type: Enhanced Global Direct Access Arrangementr

Specifications of SI3015-KS

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Data Format: V.90
• Interface: Serial
• Voltage - Supply: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Product: Modem Module
• Supply Current: 0.3 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Baud Rates: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 336-1094

5.1. Digital Interface
The Si2400 has a universal asynchronous serial
interface
microcontroller serial interfaces. After power-up or
reset, the speed of the serial (Data Terminal
Equipment—DTE) interface is set by default to
2400 bps with the 8-bit, no parity, and one stop bit (8N1)
format described below. The PCM codec serial interface
is disabled by default and CLKOUT is set to
9.8304 MHz after power-up or reset.
The serial interface DTE rate can be modified by writing
SE0[2:0] (SD) with the value corresponding to the
desired DTE rate. (See Table 11.) This is accomplished
with the command ATSE0=xx where xx is the
hexadecimal value of the SE0 register.
Immediately after the ATSE0=xx string is sent, the host
UART must be reprogrammed to the new DTE rate in
order to communicate with the Si2400.
The three highest DTE rates (228613, 245760, 307200)
are required for transferring PCM data from the host to
the Si2400 PCM interface for the transmission of voice
over the phone line or through the voice codec.
Table 12. Modem Configuration Examples
V.23 (1200 tx, 75 rx)
V.23 (75 tx, 1200 rx)
V.23 (600 tx, 75 rx)
V.23 (75 tx, 600 rx)
Modem Protocol
(S07[7] (HDEN) = 0, S07[6] (BD) = 0)
DTE Rate (bps)
Bell 212A
Bell 103
V.22bis
228613
245760
307200
(UART)
19200
V.22
V.21
1200
2400
9600
300
Table 11. DTE Rates
compatible
Register S07 Values
SE0[2:0] (SD)
000
001
010
011
100
101
110
111
0x06
0x02
0x03
0x00
0x01
0x16
0x24
0x12
0x20
with
standard
Rev. 1.3
5.2. Configurations and Data Rates
The Si2400 can be configured to any of the Bell and
CCITT operation modes in Table 12. The modem, when
configured for V.22bis, will connect at 1200 bps if the far
end modem is configured for V.22. This device also
supports SIA and other protocols for the security
industry. Table 10 provides the modulation method,
carrier frequencies, data rate, baud rate and notes on
standard compliance for each modem configuration of
the Si2400. Table 12 shows example register settings
(S07) for some of the modem configurations.
As shown in Figure 6, 8-bit and 9-bit data modes refer to
the DTE format over the UART. Line data formats are
configured through registers S07 (MF1) and S15 (MLC).
If the number of bits specified by the DTE format differs
from the number of bits specified by the DCE (Data
Communications Equipment or Line) format, the MSBs
will either be dropped or bit-stuffed, as appropriate. For
example, if the DTE format is 9 data bits (9N1), and the
line data format is 8 data bits (8N1), then the MSB from
the DTE will be dropped as the 9-bit word is passed
from the DTE side to the DCE (line) side. In this case,
the dropped ninth bit can then be used as an escape
mechanism. However, if the DTE format is 8N1and the
line data format is 9N1, an MSB equal to 0 will be added
to the 8-bit word as it is passed from the DTE side to the
DCE side.
The Si2400 UART does not continuously check for stop
bits on the incoming digital data. Therefore, if the TXD
pin is not high, the RXD pin may echo meaningless
characters to the host UART. This requires the host
UART to flush its receiver FIFO upon initialization.
5.2.1. Command/Data Mode
Upon reset, the modem will be in command mode and
will accept AT-style commands. An outgoing modem
call can be made using the “ATDT#” (tone dial) or
“ATDP#” (pulse dial) command after the device is
configured. If the handshake is successful, the modem
will respond with the “c”, “d”, or “v” string and enter data
mode. (The byte following the “c”, “d”, or “v” will be the
first data byte.) At this point, AT-style commands are not
accepted. There are three methods which may be used
to return the Si2400 to command mode:
Data Form at: SE0[3] (ND)
Data Rate: SE0[2:0] (SD)
TXD
RXD
Figure 6. Link and Line Data Formats
DTE Interface
Si2400
Si3015
DCE (Line) Interface
Data Form at: S15 (MLC)
Data Rate: S07 (MF1)
Si2400
RJ11
15