Measurement Computing WaveBook rev.5.3 - Manual (Page 84)

8-Bit Mode
The following pinout can be used for a WaveBook/512A, /516, /516A, or /516E providing that the unit is in the 8-bit
mode, instead of in the 16-bit mode as discussed in the preceding section. When in 8-bit mode, the DB25 connections
are as follows:
8 Digital I/O Lines (D8 – D15)
5 Address Lines (A0 –A4)
Active-low Digital I/O Enable output (EN-)
Active-low Digital I/O Write Strobe (WR-)
Active-low Digital I/O Read Strobe (RD-)
TTL Trigger Input (TTLTRG)
+15 V (pin 23), -15 V (pin 22), 50 mA max. (each)
two +5 V power (pins 19 and 21), 250 mA max. (total)
two Digital Grounds (pins 24, and 25)
Digital Clock (pin 18), only used for WBK17 applications
External Clock Input (pin 20)
DB25 Pinout, 8-Bit Mode
D8 through D15 Digital I/O data lines
A0 through A4 Digital I/O address lines
EN- Active-low digital I/O enable
RD- Active-low read strobe
WR- Active-low write strobe
TTLTRG TTL trigger input
+5 VDC 250 mA maximum
+15,-15 VDC 50 mA maximum (each)
Digital Grounds Pins 24, and 25
Digital Clock Pin 18, only used for WBK17
applications
External Clock Input Pin 20
DB25 Pinout for 8-Bit Mode
To sample just 8 digital input signals, make connections directly to the digital I/O data lines. D15 is the
most significant bit, and D8 is the least. The address lines, the read and write strobes, and enable signal
can be left disconnected.
4-14 WaveBook Operation Reference 897895 WaveBook/512A, /516, /516A, /516E