Microhard Systems pMDDL5824 - Page 26

© Microhard 26
3.0 Hardware Features
Pin Name No. Description Dir
GND 12,13,36,51,54,
57,58,62,84,86,
96,98,100
Ground reference for logic, radio, and I/O pins.
DNC 2,4,6,8,10,30,32 Do not connect. Reserved for factory use only.
NC 3,15,17,27,28,
29,31,33,34,35,
37,39,41,42,43,
44,45,56,59.60,
61,63,64,65,66,
67,68,69,71,73,
74,75,76,77,78,
79,80,81,82,83,8
8,90,92,94
*Currently Not Supported. For Future Expansion*
ETH_BIAS 1 Bias Voltage to Ethernet PHY transformer
RX_P0 5
Ethernet Port 0 (LAN) Receive Pair
RX_N0 7
TX_N0 9
Ethernet Port 0 (LAN) Transmit Pair
TX_P0 11
TX_P4 19
Ethernet Port 4 (WAN) Transmit Pair
TX_N4 21
RX_P4 23
Ethernet Port 4 (WAN) Receive Pair
RX_N4 25
Config 14 Active low. In normal mode, pull it low and hold for more than 8 seconds
will reset the system to default settings. Pull it low upon power up will put
the module into recovery mode.
I
CPU_LED 16 Active high output indicates CPU/Module status. Active high, cannot
drive LED directly. Requires current limiting resistor. 8mA maximum.
O
RSSI1 18 Receive Signal Strength Indicator 1. Active high, cannot drive LED
directly. Requires current limiting resistor. 8mA maximum.
O
RSSI2 20 Receive Signal Strength Indicator 2. Active high, cannot drive LED
directly. Requires current limiting resistor. 8mA maximum.
O
RSSI3
22
Receive Signal Strength Indicator 3. Active high, cannot drive LED
directly. Requires current limiting resistor. 8mA maximum.
O
LED_TX 24 Active high output indicates module is transmitting data over the RF
channel. Active high, cannot drive LED directly. Requires current
limiting resistor. 8mA maximum.
O
LED_RX 26 Active high output indicates receive and synchronization status. Active
high, cannot drive LED directly. Requires current limiting resistor. 8mA
maximum.
O
Serial RxD 38 Receive Data. Logic level input into the modem. It is recommended to
wire this pin out through a zero ohm resister to a header and jumper
block for external access to the serial port for modem recovery
procedures.
I
Serial TxD 40 Transmit Data. Logic level Output from the modem. It is recommended
to wire this pin out through a zero ohm resister to a header and jumper
block for external access to the serial port for modem recovery
procedures.
O
Caution: During power up
or reset, output pins from
the pMDDL5824 are in an
unknown state. It is advised
to use pull up or pull down
resisters as appropriate.
Table 3-3: pMDDL5824 Pin Description