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| 型號： | SI2400URT-EVB |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 7/94頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR SI2400 ISOMODEM |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | ISOmodem® |
| 主要目的： | 電信，調(diào)制解調(diào)器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | SI2400 |
| 主要屬性： | 雙路 RJ-11 連接至電話線路，音頻連接器 |
| 次要屬性： | RS-232，TTL 串行和 USB 接口 |
| 已供物品： | 板，調(diào)制解調(diào)器，電源 |
| 相關(guān)產(chǎn)品： | SI2400-BS-ND - IC ISOMODEM SYSTEM-SIDE 16SOIC SI2400-FS-ND - IC ISOMODEM SYST-SIDE DAA 16SOIC 336-1093-ND - IC ISOMODEM SYSTEM-SIDE 16SOIC |
| 其它名稱： | 336-1166 |
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Si2400
Rev. 1.3
15
5.1. Digital Interface
The Si2400 has a universal asynchronous serial
interface
(UART)
compatible
with
standard
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.
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.
Figure 6. Link and Line Data Formats
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:
Table 11. DTE Rates
DTE Rate (bps)
SE0[2:0] (SD)
300
000
1200
001
2400
010
9600
011
19200
100
228613
101
245760
110
307200
111
Table 12. Modem Configuration Examples
(S07[7] (HDEN) = 0, S07[6] (BD) = 0)
Modem Protocol
Register S07 Values
V.22bis
0x06
V.22
0x02
V.21
0x03
Bell 212A
0x00
Bell 103
0x01
V.23 (1200 tx, 75 rx)
0x16
V.23 (75 tx, 1200 rx)
0x24
V.23 (600 tx, 75 rx)
0x12
V.23 (75 tx, 600 rx)
0x20
DTE Interface
Data Rate: SE0[2:0] (SD)
Data Form at: SE0[3] (ND)
DCE (Line) Interface
Data Rate: S07 (MF1)
Data Form at: S15 (MLC)
Si3015
Si2400
RJ11
TXD
RXD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI2401 | 制造商:SILABS 制造商全稱:SILABS 功能描述:V.22BIS ISOMODEM㈢ WITH LOW-COST DAA |
| SI2401-C-FS | 制造商:Silicon Laboratories Inc 功能描述: |
| SI2401DC-EVB | 功能描述:子卡和OEM板 SI2401 Daughter Card RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| SI2401-FS | 功能描述:電信線路管理 IC 2400b/s System Side 3rd Gen DAA Tech RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| Si2401FS08-EVB | 功能描述:網(wǎng)絡(luò)開發(fā)工具 Si2401+Si3008 ISO modem Eval Board RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
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