VMIVME-2533 Differential Digital Output Board
8
Functional Description
The VMIVME-2533 transfers digital data from the VMEbus backplane to RS485/422
compatible differential output drivers. The board will support byte, word, and
longword data transfers. A simplified functional block diagram of the board is
illustrated in Figure 1 below.
The VMIVME-2533 is designed with extensive Built-in-Test electronics that enable the
user to test most of the circuitry on the board. When the VMIVME-2533 is in test
mode, data, which is written to the output registers, can be read back to verify proper
operation. This can be done without driving the output cable, and without disturbing
the field circuitry connected to the VMIVME-2533. Figure 2 below shows a simplified
diagram of the Built-in-Test features of the VMIVME-2533.
Figure 1
Basic Digital Board Functions
CONTROL
LOGIC
OUTPUT
LOGIC
32 DIFFERENTIAL
VOLTAGE OUTPUTS
V
M
E
b
u
s
F
O
U
N
D
A
T
I
O
N
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