YMF795 Просмотр технического описания (PDF) - Yamaha Corporation

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YMF795

Automobile sound Player-2

Yamaha Corporation 

YMF795

NT3 - NT0 : Pitch setting

Four bits from NT3 to 0 are used to specify the pitch. The bit assignment is as follows.

NT[3:0]

0h

1h

2h

3h

4h

5h

6h

7h

8h

9h

Ah

Bh

Ch

Dh

Eh

Fh

Pitch

Setting Prohibited

C#

D

D#

Setting Prohibited

E

F

F#

Setting Prohibited

G

G#

A

Setting Prohibited

A#

B

C

About “Setting Prohibited.”

Although LSI never hangs, unusual sound may be generated. Never set it.

CH1 - CH0 : Part setting

As the sound source section can simultaneously generate sounds in 4 parts, set the part of a note by using CH1 and 0

bits.

CH[1:0]

00b

01b

10b

11b

Part setting

0

1

2

3

VIB : Vibrato setting

This bit is used to set ON/OFF of Vibrato function for each note: “0” for OFF and “1” for ON. The vibrato frequency

is 6.4 Hz and the modulation depth is ±13.47 cent.

Note that Vibrato function becomes OFF when VIB bit of timbre data ($10-2Fh) is “0.”

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