SN761633RTAR datasheet(16/27 Pages) TI

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SN761633

FM STEREO RADIO

WITH TRANSMITTER

SLES210 – OCTOBER 2007

Table 6. Tx-Mode Write Data Symbol Description (Address Bit 2, 1 = 1,1) (continued)

SYMBOL

DESCRIPTION

DEFAULT

AFADJ2,

AF-level adjust bits

AFADJ2

AFADJ0

AFADJ1

Level

AFADJ1,

–9 dB

AFADJ0

–6 dB

–3 dB

0 dB

3 dB

6 dB

9 dB

12 dB

CP1,

CP current selection bit 1,

CP1

CP0

CP Current

CP0

CP current selection bit 0

0.6

μA

1.25

μA

2.5

μA

Table 7. Rx-Mode Read Data Symbol Description (Address Bit 2, 1 = 0,0)

SYMBOL

DESCRIPTION

READY

Ready flag

0: PLL unlocked or search operation

1: Normal operation

BAND_LMT

Band limit flag at end of search operation

0: Not reached band limit (found station)

1: Reached band limit (not found station)

(reset to 0 when I2C date write)

N13–N0

Programmable counter bits

Setting of counter after search

ST_IND

Stereo indicator bit

0: Mono reception

1: Stereo reception

IFC6–0

IF counter result bits

IF counter result (0 to 127 dec)

Step frequency = (64

× 32.768 k)/400 = 5.24288 k (Hz)

RSSI3–0

RSSI level bits

RSSI level (0 to 15 dec)

LOCKDET

Lock detect flag

0: Unlocked

1: Locked

Table 8. Tx-Mode Read Data Symbol Description (Address Bit 2, 1 = 1,1)

SYMBOL

DESCRIPTION

N13–N0

Programmable counter bits

Setting of main counter

ST_IND

Stereo indicator bit

0: Stereo modulation

1: Other status

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