SI2400-BSR Silicon Laboratories Inc, SI2400-BSR Datasheet - Page 87

• Manufacturer Part Number: SI2400-BSR
• Description: Telecom Line Management ICs CONTACT SILICON LABS FOR AVAILABILITY
• Manufacturer: Silicon Laboratories Inc
• Type: Integrated Global DAAr

Specifications of SI2400-BSR

• Product: Modem Chip
• Supply Voltage (min): 3 V
• Supply Current: 21 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin #
10
12
13
14
15
16
11
Pin Name
GPIO4
GPIO3
GPIO2
GPIO1
ISOB
GND
C1A
General Purpose Input/Output 4.
This pin can be either a GPIO pin (analog in, digital in, digital out) or the ALERT pin.
Default is digital in. When programmed as ALERT, this pin provides five functions.
While the modem is connected, it will normally be low, but will go high if the carrier is
lost, a wake-on ring (using the “ATZ” command) event is detected, a loss of loop cur-
rent event is detected, V.23 reversal is detected, or if an intrusion event has been
detected. The ALERT pin is sticky, and will stay high until the host clears it by writing
to the correct S register. (See register SE2[7:6].)
Isolation Capacitor 1A.
Connects to one side of the isolation capacitor C1.
Ground.
Connects to the system digital ground.
Bias Voltage.
This pin should be connected via the C3 capacitor.
General Purpose Input/Output 3.
This pin can be either a GPIO pin (analog in, digital in, digital out) or the ESC pin.
Default is digital in. When programmed as ESC, a positive edge on this pin will cause
the modem to go from online (connected) mode to the offline (command) mode.
General Purpose Input/Output 2.
This pin can be either a GPIO pin (analog in, digital in, digital out) or the TXD2 pin.
Default is digital in. The user can program this pin to function as TXD2 if the second-
ary serial interface is enabled. This pin is also used as the active low carrier detect pin
(CD) if enabled via the CDE bit in (S0C.7).
General Purpose Input Output 1.
This pin can be either a GPIO pin (analog in, digital in, digital out) or the RXD2 pin.
Default is digital. The user can program this pin to function as RXD2 if the secondary
serial interface is enabled. This pin can also be programmed to function as the EOFR
(end of frame receive) signal for HDLC framing.
Rev. 1.3
Description
Si2400
87