Yamaha YM2610 Datasheet
YM2610 Datasheet
1. FM – 4 Channels on 4 operators, DAC compatable with YM3016
2. SSG – 3 operators, compatable with YM2149 (Atari ST), 4th operator is Noise
3. L/R – Sound channels out
4. ADPCM-A – 6 channels 18.5 KHz, 16 MB Sample ROM size, 256 B min size of sample, 1 MB max
5. ADPCM-B – 1 channel 1.8-55.5 KHz, 16 MB Sample ROM size, 256 B min size of sample, 16 MB max,
compatable with YM2608
6. Master clock – 8MHz
7. 5V single power supply
8. 64-pin plastic SDIP
Prime function
The basic function of YM2610 can be divided roughly into four sound source part of FM sound source, SSG
sound source, and ADPCM sound source.
1) FM sound source part
The basic function of the FM sound source part is the same as OPN(YM2203).
Pronunciation mode Four operator FM method and six sound pronunciation simultaneously.
Algorithm Eight kinds.
Parameter The register address and refer to the FM sound source part.
LFO function Sine wave LFO. Pitch (PM) and, it modulates amplitude (AM). The LFO
frequency is changeable. AM on/off is possible of PMS, the AMS control, and each operator.
Compound sine wave synthesis One sound is possible in six sounds. Timer function Two kinds of timers
of A and B.
Output control On/off of L and R.
2) SSG sound source part
The SSG sound source part is the same as OPN excluding the output method.
Pronunciation form Three rectangular liquid sounds + white noise.
Function of each data Refer to the register address.
Output It outputs it from one terminal by internal mixing.
I/O port Eight bit general purpose I/O port x2
3) ADPCM sound source part
Speech analysis, synthesis, and external memory control of ADPCM sound source part. It is composed of the
AD/DA conversion function.
Sampling rate 18.5 kHz , 1.8kHz-55.5kHz
AD/DA conversion 8-bit
ADPCM analysis 4-bit
Linear interpolation rate 55.5kHz
Data memory Memory that external RAM-ROM
Output control On/off of L and R.
No sound discrimination The state under the analysis of a no sound can be identified.
4) DAC
Exclusive use DAC YM3016 is used.
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Block diagram
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Terminal arrangement chart
Terminal function
øM Master clock (standard 8MHz) of OPNA is input.
øS,SH1,SH2 It is clock (øS) for DAC and signal (SH1, SH2) of the cycle.
OPO It is a serial data of FM, ADPCM, and rhythm each sound source part output.
DO-D7 It is passing of interactive data of 8bit. CPU and data are exchanged.
/CS, /RD, /WR, A1, A0 Data passing (D0-D7) is controlled.
/IRQ The interrupt signal is output. It is an open drain output.
ANALOG OUT It is an analog output terminal in the SSG sound source part. It is source for an
output.
RAD0-RAD7 Each signal of address (A0-A7), data input (D0-D7) of ADPCM-A
RA8-RA9 Each signal of address (A8-A9) of ADPCM-A
RA20-RA23 Each signal of address (A10-A14) of ADPCM-A
/ROE ADPCM-A /OE
RMPX Address control for data access of ADPCM-A
PAD0-PAD7 Each signal of address (A0-A7), data input (D0-D7) of ADPCM-B
PA8-PA11 Each signal of address (A8-A11) ) of ADPCM-B
/POE ADPCM-B /OE
PMPX Address control for data access of ADPCM-B
/TEST It is a terminal for the test of LSI.
GND,AGND It is a ground terminal.
Vcc, AVcc It is a power supply terminal of +5V.
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