MAX1471 Maxim Integrated Products, MAX1471 Datasheet - Page 23

• Manufacturer Part Number: MAX1471
• Description: 3V/5V ASK/FSK Superheterodyne Receiver
• Manufacturer: Maxim Integrated Products

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Table 8. Control Register (Address: 0x2)
Table 9. Status Register (Read Only) (Address: 0x9)
POL_CAL_DONE
FSK_CAL_DONE
POL_CAL_EN
FSK_CAL_EN
ASKTRK_EN
FSKTRK_EN
AGCLOCK
LOCKDET
CLKALIVE
BIT ID
AGCST
BIT ID
X
X
X
calibration enable
FSK calibration
detector track
detector track
______________________________________________________________________________________
calibration done
Polling timer
FSK calibration
BIT NAME
FSK peak
ASK peak
AGC lock
Clock/crystal
Polling timer
Lock detect
BIT NAME
enable
enable
enable
AGC state
None
None
None
done
alive
ASK/FSK Superheterodyne Receiver
315MHz/434MHz Low-Power, 3V/5V
BIT LOCATION
BIT LOCATION
(0 = LSB)
(0 = LSB)
5, 4
4, 3, 2
7
6
3
2
1
0
7
6
5
1
0
0 = Internal PLL is not locked so the MAX1471 will not receive data.
1 = Internal PLL is locked.
0 = LNA in low-gain state.
1 = LNA in high-gain state.
0 = No valid clock signal seen at the crystal inputs.
1 = Valid clock at crystal inputs.
Don’t care.
0 = Polling timer calibraton in progress or not completed.
1 = Polling timer calibration is complete.
0 = FSK calibration in progress or not completed.
1 = FSK calibration is compete.
POWER-UP
Don’t care
STATE
0
0
0
0
0
Don’t care.
Locks the LNA gain in its present state.
Don’t care.
Enables the tracking mode of the FSK peak detectors
when FSKTRK_EN = 1. (See the Peak Detectors
section.)
Enables the tracking mode of the ASK peak detectors
when ASKTRK_EN = 1.
(See the Peak Detectors section.)
POL_CAL_EN = 1 starts the polling timer calibration.
Calibration of the polling timer is needed when using
the MAX1471 in discontinous receive mode.
POL_CAL_EN resets when calibration completes
properly. (See the Calibration section.)
FSK_CAL_EN starts the FSK receiver calibration.
FSK_CAL_EN resets when calibration completes
properly. (See the Calibration section.)
FUNCTION
FUNCTION
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