YMF754-R datasheet(40/60 Pages) YAMAHA

40 / 60 page

YMF754

June 28, 1999

-40-

F1h: Scan In/ Out Data

Read / Write

Default: 00h

SCAN DATA

b[7:0] ..........SCAN DATA

This is the data port for reading and writing the internal state.

F2h: Current FM Synthesizer Index

Read Only

Default: 00h

Current FM Synthesizer Index

b[7:0] ..........Current FM Synthesizer Index

This register indicates current index of the FM Synthesizer.

F3h: Current FM Synthesizer Array

Read Only

Default: 00h

CFA

b0................CFA: Current FM Synthesizer Arary

This bit indicates that the FM Synthesizer array is being currently set to Array 0 or 1.

“0”: Array 0

(default)

“1”: Array 1

F4h: FM Synthesizer / MPU401 Status

Read Only

Default: 80h

FFEMP FFFUL

MPUS

b0................MPUS: MPU401 Status

This bit indicates current MPU401 status.

“0”: Default mode (Intelligent mode)

(default)

“1”: UART mode

b6................FFFUL: FM Synthesizer FIFO Full

This bit indicates whether or not FIFO followed by the FM Synthesizer is full.

“0”: not Full

(default)

“1”: Full

YMF754-R 数据表(PDF) 40 Page - YAMAHA CORPORATION

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YMF754-R 数据表(PDF) 40 Page - YAMAHA CORPORATION

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