MSM7584C View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
MFG CO.
'MSM7584C' PDF : 57 Pages View PDF
¡ Semiconductor
MSM7584C
DATA CONFIGURATION IN THE EXTERNAL SERIAL REGISTER
X Address Space
The address space of the external serial register is accessed based on (word direction indicated
by the X address) ¥ (1 Kb depth in Y direction). The maximum X address in word direction
depends on the total memory capacity of serial registers connected. Since the leading 32 words
(32 Kb) of the serial register are used as the channel index area, X address 020h onward can be
used as the voice data area.
CR5-B5
Total Memory Capacity
(device name)
Number of words
X address*
0
1 Mb
(MSM6389)
1K words
000h to 3FFh
1
4 Mb
(MSM6684)
4K words
0000h to 0FFFh
* 0000h to 001Fh are used as the channel index area.
1
8 Mb
(MSM6685)
8K words
0000h to 1FFFh
Y Address Space
For 1 Kb ADPCM data in Y direction, 4 bits ¥ 256 samples = 1024 bits are stored in the 1 Kb
,memory area. One Y address is allocated to one sample (4 bits) of ADPCM data and addressing
is made with 00h to FFh.
X address (1 K words of 000h to 3FFh : 1 word = 1 Kb)
000h
01Fh
020h
Channel index area (32 words ¥ 1 Kb + 32 Kb)
ADPCM (voice) data area
1 Kb in Y direction
1 word = 1 Kb
Y address
00h 01h
FEh
FFh
4 bit 4 bit
4 bit 4 bit
3FFh
Figure 16 Address Space of 1 Mb Serial Register
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