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MSM7582B Datasheet

  • MSM7582B

  • p/4 Shift QPSK MODEM

  • OKI

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隆 Semiconductor
MCK
Master clock input.
The clock frequency is 19.2 MHz.
IFIN
MSM7582/7582B
Modulated signal input for the demodulator block.
Select the IF frequency from 1.2 MHz, 10.7 MHz, 10.75 MHz, and 10.8 MHz, based on CR0 鈥?B4
and B3.
IFCK
Clock signal input for demodulator block IF frequencies (10.7 MHz or 10.75 MHz).
If the IF frequency is 10.7 MHz, 19.0222 MHz should be supplied. When it is 10.75 MHz, 19.1111
MHz should be supplied. When the IF frequency is 1.2 MHz or 10.8 MHz, set this pin to 鈥?鈥?or
鈥?鈥? (Refer to Fig. 2.)
X1, X2
Crystal oscillator connection pins.
When supplying a 19.0222 MHz or 19.1111 MHz clock to IFCK, use these pins (Refer to Fig. 2.)
When IFIN = 10.7 MHz or 10.75 MHz
When IFIN = 1.2 MHz or 10.8 MHz
MSM7582/7582B
X1
X2
IFCK
MSM7582/7582B
X1
X2
IFCK
19.0222 MHz or 19.1111 MHz
Figure 2 How to Use IFCK, X1, and X2
RXD, RXC
Receive data and clock output. When power is turned on, the outputs of circuits selected by SLS1
and SLS2 appear at these pins. (Refer to Fig. 3)
RXD1
RXC
SLS2
SLS1
The recovery data and clock pulse are selected
asynchronously using the SLS signals.
Figure 3 RXD and RXC Timing Diagram
8/24

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