Datasheet

7 [3:0] [15:0]
1 0x1
[6:5] 4
0 0x4
2 Data Bytes will be read from ADDR 0x24 and ADDR 0x25.
After this process, deassert CSB.
Instruction Byte 2 (INST2)
Data Bytes
[7:0] [7:3] [2:0]
0x0 0x2
Instruction Byte 1 (INST1)
Upper Address Byte (UAB)
0x10
Transaction 2 ± Data Access
Transaction 1 ± URA Setup ± necessary only when the previous URA is different than the desired URA.
R/WB = Read/Write Address
0x10: Write Address
0x90: Read Address
R/WB = Read/Write Data
0: Write Data
1: Read Data
SZ = Size
0x0: 1 byte
0x1: 2 bytes
0x2: 3 bytes
0x3: Streaming ± 3+ bytes until CSB is de-asserted
R/WB = Read/Write Data
0: Write Data
1: Read Data
7 [3:0] [7:0]
0 0x00
SZ = Size
0x0: 1 byte
0x1: 2 bytes
0x2: 3 bytes
0x3: Streaming ± 3+ bytes until CSB is de-asserted
[6:5] 4
0 0x2 One Data Byte will be written to ADDR 0x12. After this process, deassert CSB.
Instruction Byte 2 (INST2)
Data Byte (s)
Transaction 2 ± Data Access
LMP90077, LMP90078, LMP90079, LMP90080
SNAS521F –JULY 2011–REVISED MARCH 2013 www.ti.com
The next example shows how to write one data byte to ADDR 0x12. Since the URA for this example is the same
as the last example, transaction 1 can be omitted.
Figure 60. Register-Write Example 2
Reading from Register Example
The following example shows how to read two bytes. The first byte will be read from starting ADDR 0x24, and
the second byte will be read from ADDR 0x25.
Figure 61. Register-Read Example
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