Si2439-A-FM18-EVB Silicon Labs, Si2439-A-FM18-EVB Datasheet - Page 5

• Manufacturer Part Number: Si2439-A-FM18-EVB
• Description: Networking Development Tools 38pin Si2439+ Si3018 ISOmodem Eval Board
• Manufacturer: Silicon Labs
• Type: Network Controller & Processorr

Specifications of Si2439-A-FM18-EVB

• Rohs: yes
• Tool Is For Evaluation Of: Si2439
• Data Rate: 56 Kbps
• Interface Type: RJ-11, RS-232, SPI, UART, USB
• Operating Supply Voltage: 3.3 V

Si2493/57/34/15/04
G l o b a l I S O m o d e m - E V B
1.3.2. Daughter Card Configuration
The daughter card comes configured with either a 24-
pin FT or 16-pin FS system side part and either 32 kHz
or 4.9152 MHz operation, and UART operation.
The
daughter card can also be setup to operate with a third
clock frequency, an on board 27 MHz oscillator. To
change between these options requires component
changes on the daughter card.
The daughter card can also operate in three possible
interface modes: parallel bus mode, in SPI mode as well
as the default UART mode.
There are six small (0402) strapping resistors (R101 to
R106) that are on the daughter card and are configured
differently depending
on the combination of chip
package, clock frequency chosen, and interface mode.
See Figures 5 and 6 for details.
The card and its options are shown in Figure 4, which
shows the Modem Daughter card Rev 2.0 top and
bottom views with the critical parts that may be changed
to select another command mode (i.e. SPI) or an
alternate crystal frequency, such as 4.9152 MHz.
Rev. 0.7
5