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參數(shù)資料
| 型號(hào)： | MSM7584C |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | π/4 Shift QPSK MODEM(π/4移動(dòng)QPSK調(diào)制解調(diào)器/ADPCM編碼譯碼器) |
| 中文描述： | π/ 4移位的QPSK調(diào)制解調(diào)器（π/ 4移動(dòng)的QPSK調(diào)制解調(diào)器/差分PcM編碼譯碼器） |
| 文件頁數(shù)： | 54/57頁 |
| 文件大?。?/td> | 321K |
| 代理商： | MSM7584C |
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Semiconductor
MSM7584C
54/57
Playback Method (See the flow chart in Figure 19)
(1) Set up the connection between
the serial register/voice ROM
and ADPCM transmit-receive
system. (See Figure 20) (CR5 -
B7)
Specify the serial register/voice
ROM. (CR5 - B6)
Set the external capacity. (CR5 -
B5)
Set the NOP command. (CR5 -
B1 = "0", B0 = "0")
(2) Set the channel. (CR13 - B7 to
B3)
Set the ADRD (address read)
instruction. (CR13 - B1 = "1", B0
= "0")
(3) The start/stop address of the
channel set by the ADRD
instruction is fetched from the
channel index area.
When status register BUSY (CR7
- B1) changes from "1" to "0",
fetching is complete.
(4) Start playback by setting the
PLAY (playback) command
(CR5 - B1 = "0", B0 = "1").
(5) Check the playback start with
the status register RPM bit (CR7
- B0 = "1").
(6) To stop playback set the STOP
command (CR5 - B1 = "1", B0 =
"1").
(7) When the address counter
reaches the stop address,
playback is complete.
Check completion of playback
with RPM bit = "0".
Playback
BUSY = 0
RPM = 0
N
Basic setting
Y
(1) CR5
Channel setting
(ADRD)
(2) CR13
BUSY = 0
N
(3) CR7
PLAY
(4) CR5
Playback start
RPM = 1
N
(5) CR7
Playback start
check
STOP
Y
Y
RPM = 1
N
(7) CR7
Playback completion
check
Y
END
(6)
CR5
Playback stop
Figure 19 Flow Chart of Playback
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