SI2401FS10-EVB Silicon Laboratories Inc, SI2401FS10-EVB Datasheet - Page 2

• Manufacturer Part Number: SI2401FS10-EVB
• Description: BOARD EVAL SI2401 UART INTERFACE
• Manufacturer: Silicon Laboratories Inc
• Series: ISOmodem®r

Specifications of SI2401FS10-EVB

• Main Purpose: Telecom, Modem
• Embedded: No
• Utilized Ic / Part: SI2401
• Primary Attributes: Dual RJ-11 Connection to Phone Line, Audio Connector
• Secondary Attributes: RS-232, TTL Serial & USB Interfaces
• Processor To Be Evaluated: Si2401
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 336-1167

Si2401FS10-EVB
1. Introduction
Notable differences between the Si2401 and other
ISOmodem products are highlighted in the bulleted list
below. For complete details and specifications, refer to
the current Si2401 data sheet.
Unique Si2401 Features:
2
ATSF4 = 00 Removes audio mute
ATS00 = 02 Auto-answer after two rings
ATS07 = 06 Configures modem for V.22b
Command
V22bis
V.22
V.21
Bell 212A
Bell 103
V.23 (1200 TX, 75 RX—Answer)
V.23 (75 TX, 1200 RX—Originate)
V.23 (600 TX, 75 RX—Answer)
V.23 (75 TX, 600 RX—Originate)
Many AT commands execute when entered without
<CR>.
S-Register address and value are entered in hex
(example: ATS0F = 2B).
Result codes are abbreviated (example: “O” instead
of “OK”).
The Si2401DC power must be 3.3 V.
Several AT commands are required to enable the
speaker:
DTE interface default is 8N1, 2400 bps, hardware
flow control, and no linefeeds with carriage returns.
ATDT is disabled if linefeeds with carriage returns
are enabled.
Some common AT Commands are not available:
ATM1
Table 1. Modem Configuration Examples
ATSE2 = 80 configures GPIO4 for AOUT.
ATSF4 = 00 removes Tx and Rx audio mute.
ATM2 turns on speaker continuously.
A/
ATD (must be ATDT or ATDP)
AT&Tn (use ATSE4=20 for local digital loopback)
Table 2. Modem Initialization Example
Turns on speaker until carrier negotiated
Modulation
Function
ATS07 =
01
24
20
06
02
03
00
14
10
Rev. 1.1
2. Si2401FS10-EVB Setup and
This section explains how to set up the Si2401FS10-
EVB for evaluation as an RS-232 or USB interface
modem. Jumper settings, power connection, PC/
terminal
configuration settings are given. After power is applied,
the initial modem setup and a basic tutorial on modem
operation
configurations for evaluating additional features are
discussed separately.
2.1. Si2401FS10-EVB Quick Start—RS-232
1. Set jumpers according to Figure 1.
2. Connect:
3. Bring up:
4. Type “AT” followed by a carriage return.
5. Type:
2.2. Si2401 FS10-EVB Quick Start—USB
1. Set jumpers according to Figure 2.
2. Connect:
3. Download USB driver for your operating system from
4. Install driver.
5. Bring up:
6. Type “AT” followed by a carriage return.
7. Type:
Hardware flow control. Disable linefeeds with
carriage returns (linefeeds with carriage returns
disable ATDT commands.)
the CD supplied with the evaluation board.
Hardware flow control. Disable linefeeds with
carriage returns (linefeeds with carriage returns
disable ATDT commands).
Evaluation
DB-9 to PC COM 1 (with a pass-through cable).
RJ-11 to phone line or test box.
the 9 V ac adaptor (or USB cable).
Turn on power to modem.
Set Terminal Program for 2400 bps 8N1.
Should echo “AT” and then an “O”.
ATS00 = 01 for auto-answer on first ring.
USB cable to PC.
RJ-11 to phone line or test box.
Reset the modem.
Set Terminal Program for 2400 bps 8N1.
Should echo “AT” and then an “O”.
ATS00=01 for auto-answer on first ring.
Interface
Interface
connections,
are
provided.
and
The
terminal
Si2401FS10-EVB
program