Theory of Operation
2-4
MTX100A MPEG Recorder & Player Service Manual
A35 Power Switch Board
The A35 Power Switch board is connected to the A20 PCI Backplane board
through the A30 Front Panel board. There are two USB connectors on the board
that are directly connected to the USB2.0 interface connector on the CPU board.
The board also has the power supply module for the LCD back light.
A40 AC Distributer Board
The A40 AC Distributer board supplies standby power (5VSB) to the SBC and
the ATX power control circuit on the A20 Backplane board.
A50 Disk I/F board
The A50 disk I/F board interfaces between the secondary IDE connector on the
CPU board and the DVD drive module.
A100 ASI Interface Module (Option 01)
The A100 ASI Interface module consists of the following blocks:
The local bus interface communicates with the A12 Main board. There are two
sets of 16-bit signal lines for Rx and Tx: 8-bit data lines for single-end connec-
tion, 4-bit control lines for single-end connection, and 4-bit control lines for
differential connection. These lines are connected to the A12 Main board
individually.
The FPGA consists of an FIFO and a PCI interface. The FIFO is used to output a
stream data in packet mode. In this mode, a stream data from the A12 Main
board is stored in it, and then the data is output synchronously with the PSYNC
signal. In the burst mode, the FIFO is used only to synchronize with the clock
signal. There is a 32-bit resistor in the PCI interface and it controls the board
operation.
Local Bus Interface
FPGA
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