Digi Rabbit 5000, User Manual

Page: 285 / 414

Chapter 23 802.11b/g Wireless 285
23.2 Dependencies
23.2.1 I/O Pins
The wireless network port interface has 28 dedicated pins, as shown in Table 23-1. Of
those, 20 are digital and can be used as general-purpose I/O via NBDRR, NBDTR, and
NBDMR if the network port is not being used.
Table 23-1. Wireless Port Interface
Block Section Signal Direction Function
Analog
Input
VINQP Input
Q channel differential input
VINQN Input
VINIP Input
I channel differential input
VININ Input
Output
VOUTPQ Output
Q channel differential output
VOUTNQ Output
VOUTPI Output
I channel differential output
VOUTNI Output
Clock CLK_IN Input 20 MHz clock input
Digital
Auto Gain
Correction
VGA[4:0] Output Variable gain amplifier setting
LNA[1:0] Output Linear amplifier setting
Control
TX_ON Output Transmit enable
RX_ON Output Receive enable
LOCK Input Transceiver PLL lock input
RXHP Output
Reserved for future use, may be
used as a general-purpose output
ANT_SEL Output Antenna select enable
/ANT_SEL Output Antenna select enable
PA2G_ON Output 2G preamplifier enable
PA5G_ON Output 5G preamplifier enable
ACT_LED Output Activity LED control
BOOTMUX Output General-purpose output
Management
SCLK Output 3-wire serial clock
SDATA Output 3-wire serial data
/SEN Output 3-wire serial enable