AD6650ABCZ Analog Devices Inc, AD6650ABCZ Datasheet - Page 43

• Manufacturer Part Number: AD6650ABCZ
• Description: DIVERSITY IF-TO-BASEBAND GSM/EDGE NARROW-BAND RECEIVER
• Manufacturer: Analog Devices Inc

0x22: Autocalibration Register [3:0]
Address 0x22 is the autocalibration register and controls the
automatic coarse dc autocalibration at start-up.
Bit 3
Reserved. This bit should be set to 0.
Bit 2
Reserved. This bit should be set to 1.
Bit 1
Determines whether to power down the VGA and mixer on a
coarse calibration. This should be set to 0 to allow the state
machine to power down the VGA and mixer. If it is known that
there is no dc input into the part, this can be set to 1 to improve
the correction performance, which allows more flexibility in
setting the lower threshold.
Rev. A | Page 43 of 44
Bit 0
Enables the autocalibration. This should be set to 1 for
the calibration to run automatically. Then the AD6650 waits
approximately 20.63 ms after a Soft_SYNC or Pin_SYNC
enables the part and then runs a coarse dc calibration. This
allows some warm-up time for the analog path to thermally
stabilize.
0x23 to 0x3F: Reserved
These registers must not be written.
0x40 to 0x6F: Coefficient Memory
This memory is utilized to store up to forty-eight 20-bit RCF
coefficients shared by Channel A and Channel B.
0x70 to 0xFF: Reserved
These registers must not be written.
AD6650