Installing the |
Connecting the board for I/O operations
Connectors, cables – main I/O connector
The table below lists the board connector, applicable cables, and compatible accessory products.
Board connector, cables, and accessory equipment
Connector type | |
Compatible cables | |
Compatible accessory products | |
with the | |
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| |
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Pinout – main I/O connector
The
GND | 50 | 49 | +5V |
FIRSTPORTC Bit 0 | 48 | 47 | FIRSTPORTC Bit 1 |
FIRSTPORTC Bit 2 | 46 | 45 | FIRSTPORTC Bit 3 |
FIRSTPORTC Bit 4 | 44 | 43 | FIRSTPORTC Bit 5 |
FIRSTPORTC Bit 6 | 42 | 41 | FIRSTPORTC Bit 7 |
FIRSTPORTB Bit 0 | 40 | 39 | FIRSTPORTB Bit 1 |
FIRSTPORTB Bit 2 | 38 | 37 | FIRSTPORTB Bit 3 |
FIRSTPORTB Bit 4 | 36 | 35 | FIRSTPORTB Bit 5 |
FIRSTPORTB Bit 6 | 34 | 33 | FIRSTPORTB Bit 7 |
FIRSTPORTA Bit 0 | 32 | 31 | FIRSTPORTA Bit 1 |
FIRSTPORTA Bit 2 | 30 | 29 | FIRSTPORTA Bit 3 |
FIRSTPORTA Bit 4 | 28 | 27 | FIRSTPORTA Bit 5 |
FIRSTPORTA Bit 6 | 26 | 25 | FIRSTPORTA Bit 7 |
SECONDPORTC Bit 0 | 24 | 23 | SECONDPORTC Bit 1 |
SECONDPORTC Bit 2 | 22 | 21 | SECONDPORTC Bit 3 |
SECONDPORTC Bit 4 | 20 | 19 | SECONDPORTC Bit 5 |
SECONDPORTC Bit 6 | 18 | 17 | SECONDPORTC Bit 7 |
SECONDPORTB Bit 0 | 16 | 15 | SECONDPORTB Bit 1 |
SECONDPORTB Bit 2 | 14 | 13 | SECONDPORTB Bit 3 |
SECONDPORTB Bit 4 | 12 | 11 | SECONDPORTB Bit 5 |
SECONDPORTB Bit 6 | 10 | 9 | SECONDPORTB Bit 7 |
SECONDPORTA Bit 0 | 8 | 7 | SECONDPORTA Bit 1 |
SECONDPORTA Bit 2 | 6 | 5 | SECONDPORTA Bit 3 |
SECONDPORTA Bit 4 | 4 | 3 | SECONDPORTA Bit 5 |
SECONDPORTA Bit 6 | 2 | 1 | SECONDPORTA Bit 7 |
Figure 2. I/O connector
All the digital inputs and outputs are TTL. Under normal operating conditions, the voltages on the I/O pins range from near 0 volts for the low state, to near 5 volts for the high state. The voltages and currents of external devices usually exceed these values. Because of this, external relays are usually employed to handle higher current and voltage loads.
In addition to load matching, digital signal sources often need to be filtered or
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