Nbdp Terminal; Termcpu (16P0283A) - Furuno FS-1575 Service Manual

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7.10 NBDP Terminal

7.10.1 IB-585

The basic function of TERMCPU (Terminal CPU) is to interface the LCD, Printer, SW

board, and SD card USB board. The USB port is dedicated to keyboard and not

available for read/write memory. The SD card is limited to a file size of 16kB and 512

files. As a result, the memory capacity available for the IB-585 is "16kB × 512 = 8MB."

The IB-585 terminal unit transmits a typed message to the control unit as ASCII data,

generates NBDP signal through the 78k CPU and DSP of the T-CPU board used in the

Transceiver unit, and outputs it as 36-kHz TX IF signal to the TX board.

NBDP message received by the RX board is demodulated and decoded through the 78k

CPU and DSP of the T-CPU board, and then transmitted to the Control unit as ASCII

data. The IB-585 converts the ASCII data from the Control unit to display the message

CONFIDENTIAL (internal use only)

This confidential document is used only by FURUNO authorized persons.

It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.

Fig. 7.10.1 TERMCPU Block Diagram

7.10 NBDP Terminal

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