Avila Network Computer Operating Manual
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COM2 Serial Port Header (J6)
The COM2 serial port is available through a 10-pin header in a 2x5 configuration
with 0.1-inch pin spacing. The mating connector is an AMP/Tyco 746288-1,
available from Digi-Key as part number AKN10A-ND. The pin assignment
supports a ribbon cable connection to a standard 9-pin D-shell connector.
Pin Signal Pin Signal
1 No
Connect 2 No
Connect
3
Transmit Data
4
Clear To Send
5
Receive Data
6
Request To Send
7 No
Connect 8 No
Connect
9 Ground
10
No
Connect
COM2 Serial Port Header
JTAG Port Header (J7)
The JTAG programming port is available through a 14-pin header in a 2x7
configuration with 0.1-inch pin spacing. The mating connector is an AMP/Tyco
746288-2, available from Digi-Key as part number AKN14A-ND. The primary
purpose for the JTAG Port is to facilitate program download into Flash memory.
This feature requires the GW16012 JTAG Programmer. The JTAG programming
port also includes a three-wire configuration of Serial Port 1. This feature requires
the GW16027 JTAG Serial Adapter to convert the 3.3V serial port signals to
standard RS232 levels.
Pin Signal Pin Signal
1
3.3V
2
COM1 RXD (3.3V)
3 JTAG
RST 4 Ground
5 JTAG
TDI 6 Ground
7 JTAG
TMS 8 Ground
9 JTAG
TCK 10 Ground
11 JTAG
TDO 12 Board
Reset
13
COM1 TXD (3.3V)
14
Ground
JTAG Port Header
Digital I/O Header (J8)
The digital I/O is available through a 10-pin header in a 2x5 configuration with
0.1-inch pin spacing. The mating connector is an AMP/Tyco 746288-1, available
from Digi-Key as part number AKN10A-ND. Note that GPIO3 is shared with the
status LED as described in Section 2, Digital I/O Mapping.
