Ramp-AC RF DVK Hardware
Version 1.0
Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852-2923-0610
[email protected]
www.lairdtech.com/ramp
5
CONN-GUIDE-RAMP-AC-DVK-HW
Table 1: Switch and Jumper Settings
Switch / Jumper
Description
Program Mode/
Normal Mode (S6)
When this switch is moved to the Program Mode position, the RTS pin from the
DB9/USB connector is connected to the Command/Data pin (AC4490, AC4486,
AC4424, AC4790, AC4868), the TE pin (AC3124, AC1524) and the Pktmode pin
(AC5124) of the transceiver.
RTS of the transceiver is also connected to GND which allows the SDK software to
control these pins with RTS always enabled.
When the switch is moved to the Normal position, RTS at the DB9/USB connector is
connected to RTS pin of the transceiver and Command/Data is left disconnected.
The AC4424, AC4490, AC4790, AC4486, and AC4868 families all support AT
commands for making changes to the EEPROM settings.
If the
Read/Write with AT Commands checkbox is enabled on the PC Settings page of
the configuration software, then the Program/Normal switch can be set to Normal.
The AC5124 family also supports AT Commands when that function is enabled in the
transceiver EEPROM.
RESET (S1)
When this button is pressed, the transceiver hardware performs a soft reset.
WR ENABLE (S2)
When this button is pressed, it takes the Write Enable pin (AC4424, AC5124, AC3124,
and AC1524) or GI1 pin (AC4490, AC4486, AC4790, AC4868) low.
Note: This button must be pressed and held during the write process for AC5124,
AC3124, AC1524, and AC4424 product families.
RS485 or TTL
Radio
If using a transceiver module fitted with a RS-485 interface chip, select the RS485
Radio. This converts the transceiver’s RS-485 interface to serial, which is then
converted to the interface selected by the COMM SELECT jumper.
If not using a transceiver module fitted with a RS-485 interface chip, select the TTL
Radio.
COMM SELECT
(J12)
When this jumper is moved to the RS232 Enable
position, RS-232 communication is
enabled through the DB9 connector (J2).
When this jumper is moved to the RS485 Enable
position, RS-485 communication is
enabled through the RS-485 header pins.
When this jumper is moved to the Loopback Mode
position, the transceiver TxD pin is
tied to the transceiver RxD pin. This is only valid for AC5124, AC4424, AC4486,
AC4490, AC4790, and AC4868 products. RTS mode must be disabled on the
transceiver when Loopback Mode is enabled. This is incompatible with RS485 Radio
selection.
When this jumper is moved to the 40 Pin Header
position, serial communication is
enabled through the 40 pin header (J3). Depending on the transceiver used, signal
levels must be either 3.3V or 5V.
When this jumper is moved to the USB Enable
position, USB communication is enabled
through the USB Type B connector (J8).
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
