Configuration and Installation Chapter 2
Lab-NB User Manual 2-12 © National Instruments Corporation
Table 2-2. Port C Signal Assignments
Programming
Mode Group A Group B
PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
Mode 0 I/O I/O I/O I/O I/O I/O I/O I/O
Mode 1 Input I/O I/O IBFASTBA* INTRASTBB* IBFBBINTRB
Mode 1 Output OBFA* ACKA* I/O I/O INTRAACKB* OBFB* INTRB
Mode 2 OBFA* ACKA* IBFASTBA* INTRAI/O I/O I/O
* Indicates that the signal is active low.
Timing Specifications
The handshaking lines STB* and IBF are used to synchronize input transfers. The handshaking
lines OBF* and ACK* are used to synchronize output transfers.