APE1553-1/2(-DS) Hardware Manual
9
Figure 3.2.2.3-1 Discrete I/O-Pin
Ground
FPGA
Output-Pin
Discrete IO-Pin
Front/Rear Connector
APE1553-x
Pulldown
Resistor
Current
limiting
Resistor
1 kOhm
Onboard
5V
Current
limiting
Resistor
10 kOhm
Input-Pin
FPGA
Ground
Discrete output circuitry
Discrete input circuitry