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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)： | 7/57頁 |
| 文件大?。?/td> | 321K |
| 代理商： | MSM7584C |
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Semiconductor
MSM7584C
7/57
PCMSO
Transmit PCM data output.
This PCM output signal is output from MSB synchronously with the rising edge of BCLK and
XSYNC.
PCMSI
Transmit PCM data input.
This signal is converted to the ADPCM data. The PCM signal is shifted in on the falling edge of
BCLK. Normally, this pin is connected to PCMSO.
PCMRO
Receive PCM data output.
The PCM signal is the output signal after ADPCM decoder processing. This signal is serially
output from the MSB synchronously with the rising edge of BCLK and RSYNC.
PCMRI
Receive PCM data input.
The PCM input signal is shifted in on the rising edge of BCLK input from MSB. Normally, this
pin is connected to PCMRO.
IS
Transmit ADPCM signal output.
This signal is the output signal after ADPCM encoding, and is serially output from MSB
synchronously with the rising edge of BCLK and XSYNC. This pin is an open drain output which
requires a pull-up resistor and goes to a high impedence state during power-down mode.
IR
Receive ADPCM signal input.
Input data is shifted in serially from MSB on the rising edge of BCLK synchronously with
RSYNC.
BCLK
Shift clock input for the PCM data (PCMSO, PCMSI, PCMRO, PCMRI) and the ADPCM data
(IS, IR) .
The frequency ranges from 64 kHz to 2048 kHz.
SYNC
8 kHz synchronous signal input for transmit/receive PCM and ADPCM data.
This signal should be synchronous with BCLK. SYNC is used for indicating MSB of the transmit
serial PCM and ADPCM data stream.
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