MAX2769BETI/V+T【PDF 20/27 页】IC RCVR GPS UNIVERSAL 28TQFN

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MAX2769B

Universal GPS Receiver

Table 8. Configuration 2 (Address: 0001)

DEFAULT

DATA BIT

LOCATION

VALUE

DESCRIPTION

(PGM = 0)

IQEN

27

0

I and Q channels enable. Set 1 to enable both I and Q channels and 0 to enable I

channel only.

AGC gain reference value expressed by the number of MSB counts (magnitude bit

GAINREF

26:15

170d

density). 10101010 = 234 magnitude bit density reference, 1010100 = 84 magnitude bit

density reference, 100111010 = 314 magnitude bit density reference.

RESERVED

AGCMODE

FORMAT

BITS

DRVCFG

RESERVED

RESERVED

DIEID

14:13

12:11

10:9

8:6

5:4

3

2

1:0

00

00

01

010

00

1

0

00

Reserved.

AGC mode control. Set D12:D11 = 00: independent I and Q; 01: reserved; 10: gain is set

directly from the serial interface by GAININ; 11: reserved.

Output data format. Set D10:D9 = 00: unsigned binary; 01: sign and magnitude; 1X:

two’s complement binary.

Number of bits in the ADC. Set D8:D6 = 000: 1 bit, 001: reserved; 010: 2 bits;

011: reserved, 100: 3 bits.

Output driver configuration. Set D5:D4 = 00: CMOS logic, 01: reserved; 1X: analog

outputs.

—

—

Identifies a version of the IC.

Table 9. Configuration 3 (Address: 0010)

DEFAULT

DATA BIT

LOCATION

VALUE

DESCRIPTION

(PGM = 0)

PGA gain value programming from the serial interface in steps of dB per LSB. 000000 =

GAININ

27:22

111010

PGA gain set to 0dB, 101011 = 42dB, 101100 = 43dB, 101110 = 45dB, 111010 = 57dB,

111111 = 62dB.

RESERVED

HILOADEN

RESERVED

RESERVED

RESERVED

RESERVED

FHIPEN

RESERVED

RESERVED

RESERVED

21

20

19

18

17

16

15

14

13

12

1

0

1

1

1

1

1

1

1

0

—

Set 1 to enable the output driver to drive high loads.

—

—

—

—

Highpass coupling enable. Set 1 to enable the highpass coupling between the filter

and PGA, or 0 to disable the coupling.

—

—

—

DSP interface for serial streaming of data enable. This bit configures the IC such that the

STRMEN

11

0

DSP interface is inserted in the signal path. Set 1 to enable the interface or 0 to disable

the interface.

Maxim Integrated

20

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