MSM7582 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM7582

π/4 Shift QPSK MODEM

Oki Electric Industry 

,
¡ Semiconductor

MSM7582B

(1) CR0 – B6 = "0"

TXD

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13

TXCI

(384 kHz)

TXW

TXCO

Dn-1 Dn

MSM7582/7582B

(384 kHz)

I, Q

Ramp rise-up

Ramp fall-down

,
2 symbols

Delay of 6.25 symbols

(2) CR0 – B6 = "1"

TXD

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13

TXCI

(3.84 MHz)

TXW

TXCO

(384 kHz)

I, Q

Delay of 6.25 symbols

2 symbols

Dn-1 Dn

Delay of 6.25 symbols

Ramp rise-up

2 symbols

Delay of 6.25 symbols

Ramp fall-down

2 symbols

I+, I–

Figure 1-2 Transmit Timing Diagram

Quadrature modulation signal I component differential analog outputs.

Their output levels are 500 mVpp with 1.6 Vdc as the center value. The output pin load conditions

are: R ≥ 10 kW, C ≤ 20 pF. The gain of these pins can be adjusted using the control register CR1

– B7 to B4, and the offset voltage at the I– pin can be adjusted using CR3 – B7 to B3.

Q+, Q–

Quadrature modulation signal Q component differential analog outputs.

Their output levels are 500 mVPP with 1.6 Vdc as the center value. The output pin load conditions

are: R ≥ 10 kW, C ≤ 20 pF. The gain of these pins can be adjusted using the control register CR1

– B3 to B0, and the offset voltage at the Q– pin can be adjusted by using CR4 – B7 to B3.

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