MAX2121 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2121 Datasheet PDF : 18 Pages
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Complete Direct-Conversion L-Band Tuner
Detailed Description
Register Description
The MAX2121 includes 12 user-programmable registers
and two read-only registers. See Table 1 for register
configurations. The register configuration of Table 1
shows each bit name and the bit usage information for all
registers. Note that all registers must be written after and
no earlier than 100µs after the device is powered up.
Table 1. Register Configuration
MSB
LSB
REG REGISTER READ/ REG
NUMBER NAME WRITE ADDRESS
DATA BYTE
D[7]
D[6]
D[5]
D[4]
D[3]
D[2] D[1] D[0]
1
N-Divider
MSB
Write
0x00
FRAC
1
N[14]
N[13]
N[12]
N[11] N[10] N[9] N[8]
2
N-Divider
LSB
Write
0x01
N[7]
N[6]
N[5]
N[4]
N[3]
N[2] N[1] N[0]
3
Charge
Pump
Write
0x02
CPMP[1] CPMP[0] CPLIN[1] CPLIN[0]
0
0
0
1
F[19]
F[18] F[17] F[16]
4
F-Divider
MSB
Write
0x03
F[15]
F[14]
F[13]
F[12]
F[11] F[10] F[9] F[8]
5
F-Divider
LSB
Write
0x04
F[7]
F[6]
F[5]
F[4]
F[3]
F[2] F[1] F[0]
XTAL
6
Buffer and
Reference
Write
0x05
XD[2]
XD[1]
XD[0]
R[4]
Divider
R[3]
R[2] R[1] R[0]
7
PLL
Write 0x06
D24
CPS
ICP
X
X
X
X
X
8
VCO
Write
0x07
VCO[4] VCO[3] VCO[2] VCO[1] VCO[0] VAS ADL ADE
9
Lowpass
Filter
Write
0x08
10010111
10
Control Write 0x09
STBY
X
PWDN
0
X
BBG[3] BBG[2] BBG[1] BBG[0]
11
Shutdown Write 0x0A
X
PLL
DIV
VCO
BB RFMIX RFVGA FE
0
0
0
0
0
0
0
12
Test
Write
0x0B
CPTST[2] CPTST[1] CPTST[0]
0
0
0
X
TURBO
1
LD LD LD
MUX[2] MUX[1] MUX[0]
0
0
0
13
Status
Byte-1
Read
0x0C
POR
VASA
VASE
LD
X
X
X
X
14
Status
Byte-2
Read
0x0D VCOSBR[4] VCOSBR[3] VCOSBR[2] VCOSBR[1] VCOSBR[0] ADC[2] ADC[1] ADC[0]
X = Don’t care.
0 = Set to 0 for factory-tested operation.
1 = Set to 1 for factory-tested operation.
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