SI2493-D-FS18-EVB Silicon Labs, SI2493-D-FS18-EVB Datasheet - Page 9

• Manufacturer Part Number: SI2493-D-FS18-EVB
• Description: Networking Development Tools Si2493 Rev.D + SI3018 ISOmodem EVB
• Manufacturer: Silicon Labs

Specifications of SI2493-D-FS18-EVB

• Rohs: yes

The block diagram in Figure 8 shows how the two evaluation boards are connected to demonstrate voice mode
operation.
2.1.11. Voice Mode
The Si3000 is used in conjunction with the Si2493/57/34/15/04 to transmit and receive 16-bit voice samples to and
from telephone lines as shown in Figure 9.
Figure 8. Connection Block Diagram for Si3000SSI-EVB and Si24XXURT-EVB
HOST
Direct Connection
RS232
1
2
SW3
TDMA Interface
SW2
JP4
JP4
AT commands
Responses
Si3000 Daughterboard
JP5
2
1
COM 1
JP6
Speaker Mic Line
FSYNC
Windows PC
Si3000 Voice Codec
Figure 9. Voice Mode Block Diagram
Si24xx-DC
JP4
Si24xx-EVB
SDO
In
FSYNC
SDI
RJ11
Line
Note M1 and M0
jumper settings.
Out
Si3000SSI-EVB Motherboard
6
J
Si2457 Modem
SDI
Rev. 0.6
RJ11
SDO
J
3
J4
Leave J3 unconnected.
Power is provided
through JP 6 connector.
MCLK
CLKOUT
G l o b a l I S O m o d e m - E V B
Adapter
Power
J6 of Daughterboard
GND
12V
Connect the telephone to RJ11
(right side) on the Si3000
Daughterboard, NOT to the
RJ11 on motherboard. Look for
silk screen marking "HDST".
WAN
Use telephone in off
hook position to emulate
600 Ω Handset. Not all
handsets are
implemented as 2 wire
anymore.
External
Supply
+12V
Telephone
DAA
Handset
2- wire
9