Ramp-AC RF DVK Hardware
Version 1.0
C
ONTENTS
Contents ..................................................................................................................................................... 3
Introduction ............................................................................................................................................... 4
Hardware ................................................................................................................................................... 4
AC Series DVK Board ............................................................................................................................... 4
Interfacing the AC DVK to RS232 Hardware ......................................................................................... 9
Interfacing the AC DVK to RS485 Hardware ......................................................................................... 9
Power Requirements .......................................................................................................................... 10
Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852-2923-0610
wireless.support@lairdtech.com
www.lairdtech.com/ramp
3
CONN-GUIDE-RAMP-AC-DVK-HW
Ramp-AC RF DVK Hardware
Version 1.0
I
NTRODUCTION
The Laird RF RAMP-AC Development Kit board is the standard interface for software development on all Laird
RAMP-AC products. This board is connected to a Windows PC via RS-232 connector and programmed via the
Laird Configuration Utility. This guide covers the hardware specifications of the development board,
H
ARDWARE
This section details the Development Kit boards for the AC series RAMP modules including the following:
AC4490-1000M
AC4490-200M
AC4490LR-1000M
AC4490LR-200M
AC4490-200A
AC4790-1000M
AC4790-200M
AC4790LR-1000M
AC4790LR-200M
AC4790-200A
AC4486-5A
AC4486-5M
AC5124 – EOL
AC3124 – EOL
AC4424 – EOL
AC4868 - EOL
AC Series DVK Board
The SDK board is provided so the developer can use a standard PC interface to operate the transceivers and
to aid in system integration. As shown in
Figure 1,
there are many features that enhance the functionality
and usability of this board. It uses +5V TTL, RS232, RS485, and USB data formats for interfacing with the
transceiver. The configuration and operation of the SDK board is continuously shown by the LEDs located on
the edge of the board. See
Table 1
and
Table 2
for definitions of the LEDs and switches.
Figure 1: SDK Board Assembly Drawing
Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852-2923-0610
wireless.support@lairdtech.com
www.lairdtech.com/ramp
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CONN-GUIDE-RAMP-AC-DVK-HW
Ramp-AC RF DVK Hardware
Version 1.0
Table 1: Switch and Jumper Settings
Switch / Jumper
Description
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.
Program Mode/
Normal Mode (S6)
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.
When this button is pressed, it takes the Write Enable pin (AC4424, AC5124, AC3124,
and AC1524) or GI1 pin (AC4490, AC4486, AC4790, AC4868) low.
WR ENABLE (S2)
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.
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).
COMM SELECT
(J12)
Americas: +1-800-492-2320 Option 2
Europe: +44-1628-858-940
Hong Kong: +852-2923-0610
wireless.support@lairdtech.com
www.lairdtech.com/ramp
5
CONN-GUIDE-RAMP-AC-DVK-HW
PCB Design
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