Cables And Components; Cables; Power Cable; Terminal Cable - David Griffith P112 Assembly And Operation Manual

2

Cables and Components

2.1

Cables

All the basic I/O connections are at the left edge of the PCB. You will need the
following cables to run the board:
2.1.1

Power Cable

Connects to P6. Reading from top to bottom the pins are
GND
VDD
Reset
VDD
GND
The Reset pin may be left unconnected (it has a pull-up). To force a reset, pull
this line low.
Nominal power consumption (PCB only) is 150mA at 5V.
2.1.2

Terminal Cable

RS-232 terminals may be connected to P4 and P8 with the primary terminal
being at P4. A 10-conductor ribbon cable connects via a standard IDC socket
to the board. The tenth conductor is clipped off and the rest are crimped or
soldered to a standard IDC DB-9 plug as follows:
Serial connector wired straight through (solder side view).
This generates the same pinout as a 9-pin serial port found on a typical x86 PC.
Two cables wired like this have been provided in your kit of parts. Depending
on how your terminal's serial port is wired, you may need a null modem cable
or adapter.
9 7 5 3 1
8 6 4 2
9 8 7 6 5 4 3 2 1
9