MSM9845 View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
Manufacturer
MSM9845 Datasheet PDF : 9 Pages
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1Semiconductor
FEDL9845DIGEST-01
MSM9845
Pin
50
52
44
43
54
55
46
33
47, 48
45, 26
28
29
5, 31
21, 49
30
22
Symbol
DACKL
IOW
DASD
SIOCK
XT
XT
VCK
RESET
TEST0, 1
TEST2, 3
AOUTL
AOUTR
DVDD
DGND
AVDD
AGND
Type
I
I
O
I/O
I
O
I/O
I
Description
DMA Transfer Permission Acknowledgement signal. With this pin at “L” level the
LSI enables the IOW pin to accept the signal. When stereo-playback selected, the
pin acknowledges DMA Transfer permission signal for the left channel FIFO. You
can change this pin to “H” active by a command input. When DMA Transfer is not
in use, keep the pin “H”.
When DMA Transfer selected, the signal to start writing external memory data to
the MSM9845 is entered to this pin. When DMA Transfer is not use, keep the pin
“H”.
16-bit serial data output pin when the external DAC is in use.
Synchronizing clock signal for 16-bit serial data input/output when the external
DAC is in use.
Pins wired to the oscillator. When the external clock is used, input the clock
signal to the XT pin and keep the XT pin open.
Input/Output the sampling frequency in use. The signal is used as the
synchronizing signal when the external DAC is in use.
“L” level input to this pin turns the LSI to the initial status.
I Pins for testing the LSI. Keep these pins “L”.
O The left channel output from the built-in LPF. Analog waveform output can be
directly connected to an amplifier to drive a speaker.
O The right channel output from the built-in LPF. Analog waveform output can be
directly connected to an amplifier to drive a speaker.
— Digital power supply pin. Insert a 0.1µF or larger bypass capacitor between this
pin and the DGND pin.
— Digital GND pin.
Analog power supply pin. Insert a 0.1µF or larger bypass capacitor between this
— pin and the AGND pin.
— Analog GND pin.
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