msm7582b Oki Semiconductor, msm7582b Datasheet - Page 8

• Manufacturer Part Number: msm7582b
• Description: Pie/4 Shift Qpsk Modem
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Master clock input.
The clock frequency is 19.2 MHz.
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 – B4
and B3.
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 “0” or
“1”. (Refer to Fig. 2.)
Crystal oscillator connection pins.
When supplying a 19.0222 MHz or 19.1111 MHz clock to IFCK, use these pins (Refer to Fig. 2.)
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)
MCK
IFIN
IFCK
X1, X2
RXD, RXC
RXD1
RXC
SLS2
SLS1
When IFIN = 10.7 MHz or 10.75 MHz
19.0222 MHz or 19.1111 MHz
MSM7582/7582B
X1
X2
Figure 3 RXD and RXC Timing Diagram
Figure 2 How to Use IFCK, X1, and X2
IFCK
The recovery data and clock pulse are selected
asynchronously using the SLS signals.
When IFIN = 1.2 MHz or 10.8 MHz
MSM7582/7582B
X1
X2
IFCK
MSM7582/7582B
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