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參數(shù)資料
| 型號： | MSM7584C |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | π/4 Shift QPSK MODEM(π/4移動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移動的QPSK調(diào)制解調(diào)器/差分PcM編碼譯碼器） |
| 文件頁數(shù)： | 53/57頁 |
| 文件大?。?/td> | 321K |
| 代理商： | MSM7584C |
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Semiconductor
MSM7584C
53/57
METHODS OF RECORDING AND PLAYBACK
Recording Method (See the flow chart in Figure 18)
(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 start/stop address. (CR8 to CR12)
(3) Set the channel. (CR13 - B7 to B3)
Set the ADWT (address write) instruction. (CR13
- B1 = "0", B0 = "1")
(4) The start/stop address of the channel set by the
ADWT instruction is stored in the channel index
area. When status register BUSY (CR7 - B1)
changes from "1" to "0", storage is complete.
(5) Start recording by setting the REC (recording)
command (CR5 - B1 = "1", B0 = "0").
(6) Check the recording start with the status register
RPM bit (CR7 - B0 = "1").
(7) To interrupt during recording, set the STOP
(stop) command (CR5 - B1 = "1", B0 = "1").
In this case, to store the address counter contents
in the channel index area as a new stop address,
the following settings are required:
Set the channel.
Set the ADWT instruction.
When the BUSY bit changes from "1"
to "0", settings are complete.
(8) When the address counter reaches the
stop address, recording is complete.
Check completion of recording with
RPM bit = "0".
Recording
BUSY = 0
RPM = 0
N
Basic setting
Y
(1) CR5
ST, SP
address setting
(2) CR8 to 12
Channel setting
(ADWT)
(3) CR13
BUSY = 0
N
(4) CR7
REC
(5) CR5
Recording start
RPM = 1
N
(6) CR7
Recording start
check
STOP
RPM = 0
N
Channel setting
(ADWT)
Y
Y
Y
BUSY = 0
N
RPM = 0
N
(8) CR7
Recording
completion
check
Y
Y
END
(7) CR5
Recording stop
CR13
CR7
Figure 18 Flow Chart of Recording
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