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MSM7582B Datasheet

  • MSM7582B

  • p/4 Shift QPSK MODEM

  • 170.26KB

  • OKI

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隆 Semiconductor
MSM7582B
(1) CR0 鈥?B6 = "0"
TXD
TXCI
(384 kHz)
TXW
TXCO
(384 kHz)
I, Q
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13
Delay of 6.25 symbols
(2) CR0 鈥?B6 = "1"
TXD
TXCI
(3.84 MHz)
TXW
TXCO
(384 kHz)
I, Q
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13
Delay of 6.25 symbols
I+, I鈥?/div>
Quadrature modulation signal I component differential analog outputs.
Their output levels are 500 mV
pp
with 1.6 Vdc as the center value. The output pin load conditions
are: R
鈮?/div>
10 kW, C
鈮?/div>
20 pF. The gain of these pins can be adjusted using the control register CR1
鈥?B7 to B4, and the offset voltage at the I鈥?pin can be adjusted using CR3 鈥?B7 to B3.
Q+, Q鈥?/div>
Quadrature modulation signal Q component differential analog outputs.
Their output levels are 500 mV
PP
with 1.6 Vdc as the center value. The output pin load conditions
are: R
鈮?/div>
10 kW, C
鈮?/div>
20 pF. The gain of these pins can be adjusted using the control register CR1
鈥?B3 to B0, and the offset voltage at the Q鈥?pin can be adjusted by using CR4 鈥?B7 to B3.
,

,
Dn-1 Dn
MSM7582/7582B
Ramp rise-up
2 symbols
Ramp fall-down
2 symbols
Delay of 6.25 symbols
Dn-1 Dn
Ramp rise-up
2 symbols
Ramp fall-down
2 symbols
Delay of 6.25 symbols
Figure 1-2 Transmit Timing Diagram
6/24

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