Laird RAMP, Руководство пользователя

Страница: 7 / 20

RAMP DVK Guide
Version 4.0
Americas: +1-800-492-2320 Option 3 7 Laird Technologies
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
www.lairdtech.com/ramp
Switch Definition
battery power.
If
USB Power is selected, the transceiver and development board receives
power from the USB port. USB power should only be used for AC4486,
AC4490, AC4790, and AC4868 product families. Most USB ports can only
supply 500 mA of power max, therefore it is recommended that USB power
only be used with transceivers that draw less than 300 mA peak. Though PCs
should have over-current protection for their USB ports, drawing too much
current through the USB port has the potential to cause damage to the PC and
should be avoided.
Table 4: DB9 (J2) signal definitions
J2 Pin # J1 Pin # Signal Name Description Direction
1 36 DCD Data Carrier Detect I
2 14 RXD Receive Data I
3 16 TXD Transmit Data O
4 34 DTR Data Terminal Ready O
5 1, 20, 21, 40 GND Ground
6 32 DSR Data Set Ready I
7 27 RTS Request to Send O
8 23 CTS Clear to Send I
9 19 RI Ring Indicator I
Note: I/O direction is relative to the PC.
Table 5: SDK board to transceiver pin definitions
J2
Pin
#
Type
AC5124
Pin #
AC5124
Signal
Name
AC1524/
AC3124/
AC4424/
AC4490/
AC4486/
AC4868
Pin #
AC1524/
AC3124
Signal
Name
AC4424
Signal
Name
AC4490/
AC4486
Signal
Name
AC4790
Signal
Name
AC4868
Signal
Name
1 GND 1 GND 5 GND GND GND GND GND
2 I 2 PKTMODE 17
TE Command/
Data
Command/
Data
Command/
Data
Command/
Data
3 VCC 3 VCC 10 VCC VCC VCC VCC VCC
4 NC 4 NC - NC NC NC NC NC
5 VCC 5 VCC - NC NC NC NC NC
6 NC 6 NC - NC NC NC NC NC
7 NC 7 NC - NC NC NC NC NC
8 NC 8 NC 19 NC NC DA_Out NC DA_Out
9 NC 9 NC - NC NC NC NC NC
10 NC 10 NC - NC NC NC NC NC