SI2400-FS Silicon Laboratories Inc, SI2400-FS Datasheet - Page 17

• Manufacturer Part Number: SI2400-FS
• Description: 2400 BPS ISOMODEM EM SYSTEM-SIDE
• Manufacturer: Silicon Laboratories Inc
• Type: Chipsetr

Specifications of SI2400-FS

• Package / Case: 16-SOIC (3.9mm Width)
• Data Format: V.21, V.22, V.23, Bell 103, Bell 212A
• Baud Rates: 2.4k
• Interface: UART
• Voltage - Supply: 3 V ~ 5.25 V
• Mounting Type: Surface Mount
• Product: Modem Module
• Supply Voltage (min): 3 V
• Supply Current: 28 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1166 - BOARD EVAL FOR SI2400 ISOMODEM
• Lead Free Status / Rohs Status: Supplier Unconfirmed

5.3. Low Power Modes
The Si2400 has three low power modes. These are
described below:
Register
Country
Australia
Brazil
CTR21
Czech Republic
FCC
Latvia
Malaysia
New Zealand
Nigeria
Philippines
Poland
South Africa
South Korea
Note:
DSP Powerdown. The DSP processor can be
powered down by setting register
SEB[3] (PDDE) = 1
In this mode, the serial interface still functions and
the modem will detect ringing and intrusion.
However, no modem modes or tone detection
features will function.
Wake-Up-On-Ring. By issuing the ATz command,
the Si2400 goes into a low power mode where both
the microcontroller and DSP are powered down.
Only an incoming ring or a total reset will power up
the chip again. Return from wake-on-ring will trigger
the ALERT pin if S62[4] (WOR) = 1
1. See "DC Termination" on page 79 for more information.
2. The following countries require the same settings as Brazil: Armenia, China, Egypt, Georgia, Japan, Jordan,
3. The following countries require the same settings as CTR21: Austria, Bahrain, Belgium, Bulgaria, Croatia, Cyprus,
4. When changing into or out of CTR21 Mode, LLC should be written first. SDF must be enabled (i.e., DGSR ≠ 0) and
5. The following countries require the same settings as FCC: Argentina, Brunei, Canada, Chile, Columbia, Dubai,
6. Supported for loop current ≥ 20 mA.
7. SF5[1] (RZ) should only be set for Poland, South Africa and South Korea if the ringer impedance network (C15, R14,
1, 5
2
Kazakhstan, Kyrgyzstan, Malaysia, Muldova, Oman, Pakistan, Qatar, Russia, Syria, Taiwan, Thailand, Ukraine.
Denmark, Estonia, European Union, Finland, France, Germany, Greece, Guadeloupe, Iceland, Ireland, Israel, Italy,
Lebanon, Liechtenstein, Luxembourg, Malta, Martinique, Morocco, Netherlands, Norway, Polynesia (French),
Portugal, Reunion, Spain, Sweden, Switzerland, Turkey, and the United Kingdom.
SFS should be reprogrammed before each call.
Equador, El Salvador, Guam, Hong Kong, Hungary, India, Indonesia, Kuwait, Macao, Mexico, Peru, Puerto Rico,
Romania, Saudi Arabia, Singapore, Slovakia, Tunisia, UAE, USA, Venezuela, Yemen.
Z2, Z3) is not populated.
1, 3, 4
7
, Slovenia
1
1,6
1
7
7
b
.
OHS
1
0
0
0
0
0
0
0
0
0
0
1
0
Table 13. Country-Specific Register Settings
ACT
b
1
0
1
1
0
1
0
1
1
0
0
0
0
(WOR = 0
DCT
SF5
01
01
10
10
10
11
01
10
11
01
10
10
01
b
by
Rev. 1.3
5.4. Global DAA Operation
The Si2400 chipset contains an integrated silicon direct
access arrangement (silicon DAA) that provides a
programmable line interface to meet international
telephone line requirements. Table 13 gives the DAA
register settings required to meet various country PTT
standards. A detailed description of the registers in
Table 13 can be found in "Appendix A—DAA Operation"
on page 78.
RZ
default).
Total Powerdown. Setting SF1[5] = 1
SF1[6] = 1
powerdown mode. All logic is powered down,
including the crystal oscillator and clock-out pin.
Only a hardware reset can restart the Si2400.
0
0
0
0
0
0
0
0
0
0
1
1
1
RT
b
0
0
0
0
0
0
0
0
0
0
1
0
0
will place the Si2400 into a total
SF7
LIM
0
0
1
0
0
1
0
0
1
0
0
0
0
VOL
0
0
0
0
0
0
0
0
0
0
0
0
0
SF6
b
FLVM
Si2400
and
0
0
0
0
0
0
0
0
0
1
0
0
0
LLC
S62
0
0
1
0
0
0
0
0
0
0
0
0
0
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