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F UNCTIONAL
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DESCRIPTI ON
Section 4
Functional
Jaguar Audio
Matrix output, input, and level coding is read from the backplane through
U290, U305, and U306 respectively for matrix A and U293, U292, and
U291 respectively for matrix B. U277, U295, U276, and U307 provide ad-
dress decoding for the 64X32 Audio Matrix Card.
U278 and U279 comprise the nonvolatile RAM for the processor. C156
provides memory backup voltage for approximately seven days as long
as the matrix card is not removed from the Jaguar Frame. CR3 is uti-
lized by the processor on the 64X32 Audio Matrix Card to indicate a CPU
fault condition. An external alarm connection is provided by U327. The ex-
ternal connection can be utilized to audibly indicate CPU fault conditions.
Two external sync signals are used for timing switches as set by SW1.
The external sync can be color black or composite sync. U185 and U206
decode the composite signal to an even/odd field signal which is used by
the microprocessor.
32X8 Control ICs
The 32X8 control ICs (U198, U225, U199, and U226) are responsible for
the control and switching of 32 inputs to 8 outputs for matrix A. The 32X8
control ICs (U204, U227, U205, and U228) are responsible for the control
and switching of 32 inputs to 8 outputs for matrix B. The control of the
control ICs is accomplished by signals sent over the control bus by the mi-
croprocessor. The control ICs interpret the signals and provide control sig-
nals and the BUSEN to the 32X1 crosspoint switch circuits. U215 and
U216 provide the reset, data, and clock signals for the 32X8 control ICs.
64X1 Crosspoint
The 64X1 crosspoint switches are responsible for switching one of 64 in-
puts to an output. The 64X1 crosspoint switches are comprised of four
16X1 crosspoints which form a 64X1 matrix. The switching of a selected
input signal to a selected output by 64X1 crosspoint is controlled by the
state of the associated BUS and BUSEN data lines. The 64X1 crosspoint
switches are also responsible for providing the selected output to the as-
sociated output circuit on the 64X32 Audio Matrix Card.
4.5 64X32 Analog Audio Matrix Card Continued:
Control Continued: