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Figure 8.0: 8 bit TTL I/O
Electrical schematic of the digital inputs and outputs
8 Bit TTL I/O (J6)
Refer to Figure 8.0 in order to identify each digital input/output.
Pin 1 is on the top left side.
Via J24 the output level on this connector can be switched between 3,3
and 5 Volts.
8 Bit TTL I/O Voltage Level (J24)
Refer to Figure 8.1 in order to identify the voltage level.
Figure 8.1: 8 bit TTL I/O voltage level
Connect 3&2 for 5V operation, 1&2 for 3.3 V operation.
Pin 1 is on the bottom (white dot on the board).
Digital Inputs/Outputs