SI2457-D-FT Silicon Laboratories Inc, SI2457-D-FT Datasheet - Page 246

• Manufacturer Part Number: SI2457-D-FT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-D-FT

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AN93
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Connect the prototype ground to the EVB ground.
Lift prototype C1 and C2 and EVB C1 and C2 so the Si3018 is disconnected from the Si24xx on both modems.
Connect EVB C1 and C2 to the Si3018 pad of prototype system C1 and C2.
Connect the phone line to the RJ11 jack on the prototype system.
Use PC and HyperTerm and attempt to establish a modem connection.
Connect the prototype ground to the EVB ground
Lift prototype and EVB C1 and C2 to decouple the line side from the DSP side. Do same on evaluation board.
Connect prototype system C1 and C2 to the Si3018 pad of EVB C1 and C2
Connect the phone line to the RJ11 jack on the EVB
Run the prototype system software to attempt a modem connection
Controller
Controller
PC
Host
Host
EVB
EVB
Transceiver
Transceiver
RS232
RS232
UART
UART
Host
Host
Figure 42. Test the Prototype Si3018/10 Circuitry
Figure 43. Verify Prototype Si3018/10 Failure
Si24xx
Si24xx
Si24xx
Si24xx
Rev. 1.3
C1
C1
C1
C1
C2
C2
C2
C2
Si3018
Si3018
Si3018
Si3018
Prototype System
Prototype System
Discretes
Discretes
Discretes
Discretes
To
Phone
Line
To
Phone
Line