MAX2121 View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX2121 Datasheet PDF : 18 Pages
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Complete Direct-Conversion L-Band Tuner
Table 11. Control Register (Address: 0x09)
BIT NAME BIT LOCATION (0 = LSB) DEFAULT
FUNCTION
STBY
7
Software standby control.
0 = Normal operation.
0
1 = Disables the signal path and frequency synthesizer leaving only the
2-wire bus, crystal oscillator, XTALOUT buffer, and XTALOUT buffer divider
active.
X
6
X
Don’t care.
PWDN
5
0
Factory use only.
0 = Normal operation; other value is not tested.
X
4
X
Don’t care.
BBG[3:0]
3–0
0000
Baseband gain setting (1dB typical per step).
0000 = Minimum gain (0dB, default).
…
1111 = Maximum gain (15dB typical).
Table 12. Shutdown Register (Address: 0x0A)
BIT NAME BIT LOCATION (0 = LSB) DEFAULT
FUNCTION
X
7
X
Don’t care.
PLL
6
PLL enable.
0
0 = Normal operation.
1 = Shuts down the PLL. Value not tested.
DIV
5
Divider enable.
0
0 = Normal operation.
1 = Shuts down the divider. Value not tested.
VCO
4
VCO enable.
0
0 = Normal operation.
1 = Shuts down the VCO. Value not tested.
Baseband enable.
BB
3
0
0 = Normal operation.
1 = Shuts down the baseband. Value not tested.
RFMIX
2
RF mixer enable.
0
0 = Normal operation.
1 = Shuts down the RF mixer. Value not tested.
RFVGA
1
RF VGA enable.
0
0 = Normal operation.
1 = Shuts down the RF VGA. Value not tested.
Front-end enable.
FE
0
0
0 = Normal operation.
1 = Shuts down the front-end. Value not tested.
12 ______________________________________________________________________________________
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