Datasheet

71
16
Read Data
Register Address
Read
Command
CS
CLK
DI
9
D7 D6 D5 D4 D3 D2 D1 D0
DO
1
0
A4 A3 A2 A1 A01
2 3
71
16
Register Address
Write
Command
CS
CLK
DI
9
DO
0
0
A4 A3 A2 A1 A01
2 3
0
D7 D6 D5 D4 D3 D2 D1 D0
Write Data
LM10506
SNVS729E –SEPTEMBER 2011–REVISED MARCH 2013 www.ti.com
SPI DATA INTERFACE
The device is programmable via 4-wire SPI Interface. The signals associated with this interface are CS, DI, DO
and CLK. Through this interface, the user can enable/disable the device, program the output voltages of the
individual Bucks and of course read the status of Flag registers.
By accessing the registers in the device through this interface, the user can get access and control the operation
of the buck controllers and program the reference voltage of the comparator in the device.
Figure 22. SPI Interface Write
• Data In (DI)
– 1 to 0 Write Command
– A
4
to A
0
Register address to be written
– D
7
to D
0
Data to be written
• Data Out (DO)
– All Os
Figure 23. SPI Interface Read
• Data In (DI)
– 1 to 1 Read Command
– A
4
to A
0
Register address to be read
• Data Out (DO)
– D
7
to D
0
Data Read
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