SI4702-C19 데이터 시트보기 (PDF) - Silicon Laboratories

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SI4702-C19

BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS

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To power up the device (after power down):

1. Note that VIO is still supplied in this scenario. If VIO is not

supplied, refer to device initialization procedure above.

2. (Optional) Set the AHIZEN bit low to disable the dc bias of

0.5 x VIO volts at the LOUT and ROUT pins, but preserve

the states of the other bits in Register 07h. Note that in

powerup the LOUT and ROUT pins are set to the common

mode voltage specified in Table 8 on page 12, regardless

of the state of AHIZEN.

3. Supply VA and VD.

4. Provide RCLK. Refer to AN230 when using internal

oscillator.

5. Set the ENABLE bit high and the DISABLE bit low to

powerup the device.

VA,VD Supply

VIO Supply

RST Pin

RCLK Pin

ENABLE Bit

1

2

3

4

5

Figure 9. Initialization Sequence

4.12. Programming Guide

Refer to "AN230: Si4700/01 Programming Guide" for

control interface programming information.

Si4702/03-C19

Rev. 1.1

21

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