MSM6789AGS-BK Просмотр технического описания (PDF) - Oki Electric Industry
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MSM6789AGS-BK Datasheet PDF : 53 Pages
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MSM6789A/6789L
¡ Semiconductor
PIN DESCRIPTIONS (for MSM6789A (5 V Version))
Pin
90
47
40, 55
54
48, 49
53
51
52
50
46
45
43
42
44
66
88
79
78
77
76
75
1-6
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
I
LIN
internally connected to SG (signal ground).
MOUT
LOUT
O Output of the built-in OP amplifier for MIN and LIN.
AMON
Connected to the LOUT pin in the recording mode and to the DA converter
O
output in the playback mode. This pin connects the built-in LPF input (FIN pin).
FIN
I Input of the built-in LPF.
FOUT
O Output of the built-in LPF. This pin connects the AD converter input (ADIN pin).
ADIN
I Input of the built-in 12-bit AD converter.
AOUT
Output of the built-in LPF. This pin outputs playback waveforms and connects
O
an external speaker drive amplifier.
This pin selects whether memory to be connected externally is DRAM or serial register.
DRAM/SR I
Low level : Serial register
High level : DRAM
4B/1B
This pin selects either 1-bit ¥ type DRAM or 4-bit ¥ type DRAM.
I
Low level : 1-bit ¥ type
High level : 4-bit ¥ type
These pins connect to A0 and A1 of DRAM at the time of DRAM selection. They also
A0 (SADY)
O connect to SAD pin of serial register and serial voice ROM at the time of serial
A1 (SADX)
register selection. These pins output leading addresses of read/write.
A2 (TAS)
This pin connects to A2 of DRAM at the time of DRAM selection. It also connects
to TAS pin of serial register and serial voice ROM at the time of serial register selection.
O
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.
A3 (SAS)
This pin connects to A3 of DRAM at the time of DRAM selection. It also connects
O to the SAS pin of the serial register and the SASX and SASY pins of the serial voice
ROM at the time of serial register selection. Clock pin to write serial addresses.
A4 (RWCK) O
This pin connects to A4 of DRAM at the time of DRAM selection. It also connects
to the RWCK pin of the serial register and the RDCK pin of the serial voice ROM at
the time of serial register selection. Clock pin to read data from and write data into
the serial register.
A10-A5
This pin connects to pins A5-A10 of DRAM at the time of DRAM selection.
O
This pin outputs addresses of read/write.
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