LM98640QML-SP Datasheet, PDF (35/54 Pages) Texas Instruments – Dual Channel, 14-Bit, 40 MSPS Analog Front End with LVDS Output

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Programming (continued)
1
LM98640QML-SP
SNAS461D – MAY 2010 – REVISED SEPTEMBER 2015
9
16
SCLK
SEN
SDO
XXXXXXXX
DO DO DO DO DO DO DO DO
[7] [6] [5] [4] [3] [2] [1] [0]
SDI
LM98640 outputting register contents
from previous command.
(W)
00
A5
A4
A3
A2
A1
A0
DI
[7]
DI
[6]
DI
[5]
DI
[4]
DI
[3]
DI
[2]
DI
[1]
DI
[0]
LM98640 outputting contents from write
commands register address.
R/W 0
A5
A4
A3
A2
A1
A0
DI
[7]
DI
[6]
0DVWHULVVXHV³ZULWH´ELW(0), device address bit (0), six bit register
address, and eight bit register value to be written.
Figure 26. Four Wire Serial Write
1
9
16
SCLK
SEN
SDO
XXXXXXXX
DO DO DO DO DO DO DO DO
[7] [6] [5] [4] [3] [2] [1] [0]
SDI
LM98640 outputting register contents
from previous command.
(R)
1 0 A5 A4 A3 A2 A1 A0 X X X X X X X X
LM98640 outputting contents from read
commands register address.
R/W 0
A5
A4
A3
A2
A1
A0
DI
[7]
DI
[6]
0DVWHULVVXHV³UHDG´ELW(1), device address bit (0), six bit register
address, DQGHLJKW³GRQ¶WFDUH´ELWV. Register contents are not altered.
Figure 27. Four Wire Serial Read
7.5.4 Serial Interface Timing Details
SCLK
SEN
t_SCSEN
t_OD
t_HZ
t_IS
t_IH
SDO
XXXXXXXX
t_SENSC
t_SENW
DO DO DO DO DO DO DO DO
[7] [6] [5] [4] [3] [2] [1] [0]
SDI
(R)
10
A5
A4
A3
A2
A1
A0
DI
[7]
DI
[6]
DI
[5]
DI
[4]
DI
[3]
DI
[2]
DI
[1]
DI
[0]
R/W 0
A5
A4
A3
A2
A1
A0
DI
[7]
DI
[6]
Figure 28. Serial Interface Specification Diagram
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