Datasheet

LTC2974
21
2974fc
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SLAVE ADDRESS COMMAND CODE DATA BYTE LOWWr A A A P
2974 F06
S
7 8 8 1
DATA BYTE HIGH
8
PEC
811 1 1 1 11
A A
Figure 6. Write Word Protocol with PEC
SLAVE ADDRESS Wr A A P
2974 F07
S
7 81 1 1 11
COMMAND CODE
Figure 7. Send Byte Protocol
operaTion
SLAVE ADDRESS COMMAND CODE PECWr A A A P
2974 F08
S
7 8 81 1 1 1 11
Figure 8. Send Byte Protocol with PEC
SLAVE ADDRESS COMMAND CODE SLAVE ADDRESSWr A AS
7 8 7 1
BYTE COUNT = N
8 11 1 1
Sr
11
A
1
Rd A
• • •
• • •
A P
2974 F13
DATA BYTE N
8 1 1
1
ADATA BYTE 1
8
DATA BYTE 2
81 1
A
SLAVE ADDRESS COMMAND CODE SLAVE ADDRESSWr A A A P
2974 F09
S
7 8 7 1
DATA BYTE LOW
8
DATA BYTE HIGH
811 1 1
Sr
1 1 11
A
1
Rd A
1
SLAVE ADDRESS COMMAND CODE SLAVE ADDRESSWr A A A PA
2974 F10
S
7 8 7 1
DATA BYTE LOW
8
DATA BYTE HIGH PEC
8 811 1 1 1
1
111
Sr
1
A
1
Rd A
SLAVE ADDRESS COMMAND CODE SLAVE ADDRESSWr A A Sr P
2974 F11
S
7 8 7 11
DATA BYTE
8 1
1
1 1 1 11 1
ARd A
SLAVE ADDRESS COMMAND CODE SLAVE ADDRESSWr A A Sr P
2974 F12
S
7 8 7 11
DATA BYTE
8 1
1
1 1 1 11 1
ARd A
1
A PEC
Figure 12. Read Byte Protocol with PEC
Figure 9. Read Word Protocol
Figure 10. Read Word Protocol with PEC
Figure 11. Read Byte Protocol
Figure 13. Block Read
A P
2974 F14
PEC
8 1 1
1
SLAVE ADDRESS COMMAND CODE SLAVE ADDRESSWr A AS
7 8 7 1
BYTE COUNT = N
8 11 1 1
Sr
11
A
1
Rd A
• • •
• • •
ADATA BYTE N
8 1
ADATA BYTE 1
8
DATA BYTE 2
81 1
A
Figure 14. Block Read with PEC