Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF HTML

MSM9844 Datasheet(PDF) 4 Page - OKI electronic componets

Part No. MSM9844
Description  VOICE SYNTHESIS LSI with on-chip FIFO Memory
Download  32 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  OKI [OKI electronic componets]
Homepage  http://www.oki.com
Logo 

MSM9844 Datasheet(HTML) 4 Page - OKI electronic componets

 
Zoom Inzoom in Zoom Outzoom out
 4 / 32 page
background image
Page4
¡ Semiconductor
MSM9844
• Pin Description
When 8-bit bus interface selected, you can define, by using a command,
these pins as input/output to/from external memory. When no definition
made, these pins are output mode.
When 16-bit bus interface selected, they are one half of bi-directional data
bus for data input / output from/to external micro-controller and memory.
Another half of bi-directional data bus for data input/output from/to external
micro-controller and memory and for status output.
WRITE pulse input pin. Input "L" pulse before you can enter command
and data to D15 to D0 pins.
READ pulse input pin. Input "L" pulse before the LSI can output status and
data to D15 to D0 pins.
With this pin at "L" level, the LSI accepts WRITE or READ pulse input. At
"H" level the LSI would not accept WRITE or READ pulse.
While this pin being held "H", D15 to D0 pins are enabled to input/output
sound data. While this pin being held "L", D7 to D0 pins are enabled to
input a command or output status data.
Output "L" level during playback/PAUSE operation.
Output "L" level when the LSI is ready to accept a command.
"H" level output from this pin indicates FIFO memory is empty. You can
change this pin to "L" active by a command input.
"H" level output from this pin indicates FIFO memory is more than half.
During playback, voice synthesis starts when MID changes to "H" level.
You can change this pin to "L" active by a command input. This pin
outputs a synchro signal for voice data input / output when non-use of FIFO
is selected.
"H" level output from this pin indicates FIFO memory is full. During
playback operation this pin is held "H" and FIFO memory is write -disabled.
You can change this pin to "L" active by a command input.
When DMA Transfer and stereo-playback selected by the command input,
the output from this pin becomes DMA Transfer request signal. The pin
outputs "H" when the right channel FIFO memory is empty. You can
change this pin to "L" active by a command input.
When stereo-playback selected, write sound data to the right channel FIFO
at "H" level, while data to the left channel FIFO at "L" level. When monaural
playback selected, keep this pin "L". You can change this pin to "L" active by
a command input.
When DMA Transfer and stereo-playback selected by the command input,
this pin acknowledges the right channel DMA Transfer permission signal.
With this pin at "L" level the LSI enabled the /IOW pin to accept the signal.
You can change this pin to "H" active by a command input.
Output "H" level to represent DMA Transfer request signal when FIFO gets
empty. If stereo-playback selected, the pin outputs "H" level to represent
DMA Transfer request signal when the left channel FIFO gets empty.
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".
Pin No.
Symbol
I / O
Description
I / O
I / O
I
I
I
I
O
O
O
O
I
O
I
D15 to D8
D7 to D0
WR
RD
CS
D / C
BUSY
CBUSY
EMP
FUL /
DREQR
CH /
DACKR
DREQL
DACKL
11 - 14
16 - 19
1 - 4
6 - 9
38
39
40
41
42
32
35
37
34
51
50
O
MID
36


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn