MSM6789 datasheet(40/53 Pages) OKI

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MSM6789A/6789L

¡ Semiconductor

PIN DESCRIPTIONS (for MSM6789L (3.3 V Version))

Symbol

Type

Description

DVDD

—

Digital power supply. Insert a bypass capacitor of 0.1

mF or more between this

pin and the DGND pin.

AVDD

—

Analog power supply. Insert a bypass capacitor of 0.1

mF or more between this

pin and the AGND pin.

DGND

—

Digital ground.

AGND

—

Analog ground.

SG, SGC

Output for analog circuit reference voltage (signal ground).

MIN

Inverting input of the built-in OP amplifier. The non-inverting input pin is

internally connected to SG (signal ground).

LIN

MOUT

Output of the built-in OP amplifier for MIN and LIN.

LOUT

AMON

Connected to the LOUT pin in the recording mode and to the DA converter

output in the playback mode. This pin connects the built-in LPF input (FIN pin).

FIN

FOUT

Output of the built-in LPF. This pin connects the AD converter input (ADIN pin).

ADIN

Input of the built-in 12-bit AD converter.

AOUT

Output of the built-in LPF. This pin outputs playback waveforms and connects

an external speaker drive amplifier.

SADY

These pins connect to SAD pin of serial register and serial voice ROM. These pins

output leading addresses of read/write.

SADX

This pin connects to TAS pin of serial register and serial voice ROM. This pin is used

to set serial addresses from the SADX and SADY pins into the internal address

counter of the serial register and serial voice ROM.

TAS

This pin connects to the SAS pin of the serial register and the SASX and SASY pins

of the serial voice ROM. Clock pin to write serial addresses.

SAS

This pin connects to the RWCK pin of the serial register and the RDCK pin of the

serial voice ROM. Clock pin to read data from and write data into the serial register.

RWCK

Input of the built-in LPF.

40, 55

48, 49

Write Enable. This pin connects to the WE pin of the serial register and DRAM.

This pin selects either read or write mode.

DI/O

I/O

Data I/O. This pin connects to the DIN and DOUT pins of the serial register and

DRAM. This pin is used to output write data and inputs read data.

DROM

Data ROM. This pin connects to the DOUT pin of the serial voice ROM.

CS1

Chip Slect. These pins connect CS pin of the serial register and the CS (CS1,

CS2, CS3) pins of the serial voice ROM.

CS3

CS4

MSEL1

These pins select the capacity of the memory to be connected externally.

CS2

MSEL2

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