Specifications

AN93
162 Rev. 0.8
Figure 31. Test the Prototype Modem
Figure 32. Test the Prototype Si3018/10 Circuitry
Host
Controller
Host
UART
Si24xx Si3018 Discretes
RS232
Transceiver
Si24xx Si3018 Discretes
EVB
Prototype System
 Connect prototype system ground to EVB ground
 Remove modem module from EVB
 Disconnect host outputs from prototype modem
 Connect EVB RS232 transceivers to prototype modem
 Use PC with HyperTerminal to test prototype modem
To
Phone
Line
PC
To
Phone
Line
Host
Controller
Host
UART
Si24xx Si3018 Discretes
RS232
Transceiver
Si24xx Si3018 Discretes
EVB
 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.
PC
C2
C1
C2
Prototype System
C1