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): 6/57頁
文件大?。?/td> 321K
代理商: MSM7584C
Semiconductor
MSM7584C
6/57
SGCT, SGCR
Outputs for CODEC analog signal ground.
The output voltage is approximately 1.4 V. Insert 10
m
F and 0.1
m
F bypass capacitors (ceramic
type) between these pins and the AG pin. When the device is in power down mode, the output
is 0 V.
SGCT is used for transmitting and SGCR is for receiving.
AGC
ADPCM CODEC analog ground (0 V).
DGC
ADPCM CODEC digital ground (0 V).
Since this pin is internally separated from AGC and AGM (modem ground pin), this pin must
be connected to these pins as close as possible on the circuit board.
VDDC
ADPCM CODEC 3 V power supply.
Connect this pin to the MODEM power Supply VDDM.
PDN3
ADPCM CODEC power down control input.
When this pin is set to "0" level, the device enters power down mode.
During normal operation mode, set this pin to "1" level.
The power down mode is controlled by CR0 - B5 of the control register ORed with the signal from
the PDN3 pin. Therefore, when using this pin, set CR0 - B5 to digital "0".
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