Copyright
©
Kanda 2013
7
Expansion Headers
All the device port pins are brought-out to pin headers on the edge of the board. The
layout of these connectors is shown below.
All the ports are available - Port A to Port G – and all have the same layout except Port
G. Port G is a smaller port and not all pins are brought-out because they are used by
RTC circuit – see Port G section.
Port F is used by the ADC functions, and should be used in conjunction with the Analog
header if Analog to Digital function is used.
ADC Circuit
The ADC circuit uses Port F and the 4-way Header marked Analog.
To use the ADC with the Internal Reference Pot, the jumper between AREF and POT
pins on Analog connector should be on.
To use an external reference voltage, remove jumper and connect voltage to AREF and
AGND pins.
Port G header
Port G only has 5 pins. Of these, PG3 and PG4 are used by Real Time Clock (RTC)
circuit so are NOT brought out to header. In addition to PG0/WR, PG1/RF and PG2/ALE,
this header has Reset and a VCC and GND Pin.
0
2
4
6
GND
1
3
5
7
VCC
Edge of Board
