User's Manual

Configuration and Installation Chapter 2

Lab-NB User Manual 2-16 © National Instruments Corporation

Mode 2 Bidirectional Timing

The following figure illustrates the timing specifications for bidirectional transfers in mode 2.

T10

WR *

OBF *

INTR

ACK *

STB *

IBF

RD *

DATA

Name Description Minimum Maximum

T1 WR* = 1 to OBF* = 0 – 150

T2 Data before STB* = 1 20 –

T3 STB* pulse width 100 –

T4 STB* = 0 to IBF = 1 – 150

T5 Data after STB* = 1 50 –

T6 ACK* = 0 to OBF = 1 – 150

T7 ACK* pulse width 100 –

T8 ACK* = 0 to output – 150

T9 ACK* = 1 to output float 20 250

T10 RD* = 1 to IBF = 0 – 150

All timing values are in nanoseconds.