5GHz, 4-Channel MIMO Transmitter
22 _____________________________________________________________________________________
Figure 1. 4-Wire SPI Serial-Interface Timing Diagram
Table 2. Register Summary
SPI Register Definition
(All values in the register summary table are typical numbers. The MAX2850 SPI does not have a power-on-default self-
reset feature; the user must program all SPI addresses for normal operation. Prior to use of any untested settings, contact
the factory.)
SCLK
t
CSO
t
CSS
t
DS
t
DH
t
CH
t
CL
t
CSW
t
CSH
t
CS1
A4
R/W
A0
D9
D0
DONT CARE
A0
D9
D0
A4
R/W
DIN
(SPI WRITE)
DONT CARE
DONT CARE
D9
DOUT
(SPI READ)
DIN
(SPI READ)
D0
DONT CARE
CS
t
D
REGISTER
READ/WRITE AND ADDRESS
DATA
Main0_
D0
A4:A0
WRITE (W)/
READ (R)
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Main0
0
00000
W/R
RESERVED
E_TX<4:1>
MODE<2:0>
RFBW
M/L_SEL
Default
0
1
1
1
1
0
0
0
1
0
Main1
0
00001
W/R
RESERVED RESERVED
LNA_GAIN<2:0>
RX_VGA<4:0>
Default
0
0
1
1
1
1
1
1
1
1
Main2
0
00010
W/R
RESERVED RESERVED RESERVED
LNA_BAND<1:0>
RESERVED RESERVED RESERVED RESERVED RESERVED
Default
0
1
1
0
1
0
0
0
0
0
Main3
0
00011
W
RESERVED RESERVED
TS_EN
TS_TRIG
RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED
R
RESERVED RESERVED
RESERVED
TS_READ<4:0>
Default
0
0
0
0
0
0
0
0
0
0
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