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Revision B User Manual
for the VME-SIO4: Board Revision: A
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 3580, Phone: (256) 880-8787
8
CHAPTER 1: INTRODUCTION
1.0
INTRODUCTION
The VME-SI04 interface card is capable of transmitting and receiving serial data, generating interrupts, and
providing loop-back testing.
This card provides the following specific functionality:
a. VMEbus Interface:
(1) 6U card (single slot. IEEE/ANSI-1014 compliant; A16/D16 support or better.
(2) VMEbus interrupter functionality.
(3) Jumper selectable configuration of the interrupt level and programmable interrupt vectors.
(4) FIFOs (32K x 8 bit) are provided for data transmit and for data receive to increase the size of the
transmit and receive buffers
(5) User interface signal connections are provided via 4 connectors on the front panel.
(6) All data transfers to/from the FIFOs will be via host CPU writes/reads, i.e., the board does not
include a VME DMA controller, hence this board cannot act as a VME bus master.
(7) The card also provides for self-test loop-back for verification of proper operation.
b. The following two modes of loop-back testing will be supported:
(1) internal loop-back testing (does not drive cable);
(2) external loop-back testing via an external loop-back test cable.
1.1
FUNCTIONAL DESCRIPTION
As shown in the functional block diagram (see Figure 1.1-1), this board includes the following:
a. VMEbus slave interface;
b. VMEbus interrupt module;
c. board control/status registers;
d. transceiver control logic;
e. LEDs for board status indication;
f. an oscillator (for synchronization of all logic on the board);
g. a cable data driver;
h. a cable data receiver (receive voltage level converter);
i. a transmit FIFO;
j. a receive FIFO.
1.2
BOARD IDENTIFICATION
Two (2) read-only registers will be provided for board identification:
a. manufacturer’s ID; and
b. board type.
These two registers will be modeled after the VXI specification.
The manufacturer’s ID register will return 0xFEAC when read, while the board type register will return 0xF4E4
when read. These two registers will give an indication of basic board response.