MSM7582TS-K 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM7582TS-K

π/4 Shift QPSK MODEM

Oki Electric Industry 

¡ Semiconductor

MSM7582/7582B

(6) CR5

CR5

Initial value

B7

B6

B5

B4

B3

B2

B1

B0

BSTO

ENBL

ICT6

ICT5

ICT4

LOCAL

INV1

LOCAL

INV0

CLK

SEL1

CLK

SEL0

0

0

0

0

0

0

0

0

B7: Modulator burst window output enable bit.

1/The timing of the I and Q baseband modulation output burst is output at the TXCO pin.

0/The 384 kHz transmit timing clock pulse is output at the TXCO pin.

B6 to B4: ICT6 to ICT4. Device test control bits.

B3, B2: Local inverting mode setting bits.

(1, 1) = local inverting mode

(0, 0) = normal mode

B1: Clock pulse shaping mode selection bit.

1/Clock pulse shaping mode (Refer to Fig 9.)

0/Oscillator circuit mode

B0: Power-on control bit for X1, X2 pins, when the clock pulse shaping mode.

1/ Always power-on

0/ Power-down in the whole device power-down state when Power on otherwise.

Note: CR5 – B6 to B4 are used to test the device. They should be set to “0” during normal

operation.

MSM7582/82B TS-K

X1 X2 MCK

TCXO

19.2 MHz

About

Pulse shape

To other input

0.7 to 1.0 VPP within about 3 VPP of 19.2 MHz

Figure 9 Example of Application Circuit when the Clock Pulse Shaping Mode is

Generated by CR5-B1

20/24

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