Yamaha OPL3-SA3 FUNCTION OVERVIEW 1.Multi-purposepin, Multi-purposefunction, YMF715E

YMF715E

■FUNCTION OVERVIEW

1.Multi-purpose pin

1-1. Multi-purpose function

OPL3-SA3 can support the various functions listed below by programming SEL2-0 pins.

A.16-bit address decode

B.EEPROM interface

C.Zoomed video port

D.CPU and DAC interface for OPL4-ML/ML2

E.MODEM interface

F.IDE CD-ROM interface

Following table shows what combinations of the above functions are available for each SEL2-0 pins.

SEL	16bit Dec.	EEPROM	ZV port	OPL4-ML/ML2	MODEM	CDROM	Remark
0	-	-	-	-	-	-	Test mode
1	○(*1)	○	-	○(*2)	○	○(*1)	S/C,C/C(add-in)
2	○	○	-	○(*3)	○	-	S/C (add-in)
3	○(*4)	○	-	○	-	-	S/C (add-in)
4	○(*4)	-	○	○	-	-	Note PC
5	○	-	○	○(*3)	○	-	Note PC
6	-	-	-	-	-	-	reserved
7	○	-	-	○	-	-	M/B, Note PC

Where,

S/C : Sound Card

C/C : Combo Card (Sound and Modem)

M/B : Desktop Mother Board

	SEL=0	SEL=1	SEL=2	SEL=3	SEL=4	SEL=5	SEL=6	SEL=7
SEL0 pin	0	1	0	1	0	1	0	1
SEL1 pin	0	0	1	1	0	0	1	1
SEL2 pin	0	0	0	0	1	1	1	1

Notice

*1 : External PAL is needed.

*2 : External wavetable synthesizer (ex.OPL4-ML/ML2) is mixed as analog signal using external DAC.

*3 : Clock module (ex.MK1420) is used to generate the clock for OPL4-ML/ML2 and it will be mixed analog signal by having an additional DAC.

*4 : External TTLs (ex.LS138) is needed.

See section 1-2 and 1-3 for implementation detail.

May 21, 1997

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