ISL6398 Datasheet, PDF (37/57 Pages) Intersil Corporation – Programmable soft-start rate and DVID rate

5. Block Read Protocol
ISL6398
1
7+1
1
S Slave Address_0 A
8
11
7+1
1
8
Command Code A RS
Slave Address_1 A
Byte Count = N
1
8
A Data Byte 2
1
8
1
A Data Byte N
A
1
8
A Lowest Data Byte
8
PEC
11
NP
Optional 9 Bits for SMBus/PMBus
NOT used in I²C
Example command: 8B READ_VOUT (Two words, read voltage of the selected rail).
NOTE: All Writable commands are read with one byte word protocol.
STOP (P) bit is NOT allowed before the repeated START condition when “reading” contents of a register.
6. Group Command Protocol - No more than one command can be sent to the same Address
1
7+1
S Slave ADDR1_0
1
7+1
RS Slave ADDR2_0
1
7+1
RS Slave ADDR3_0
1
8
A Command Code
1
8
A Command Code
1
8
A Command Code
1
8
A Low Data Byte
1
8
A Data Byte
1
8
A Low Data Byte
1
8
1
A High Data Byte
A
1
8
1
A
PEC
A
1
8
1
A High Data Byte
A
8
PEC
8
PEC
1
A
11
AP
Optional 9 Bits for SMBus/PMBus
NOT used in I²C
7. Alert Response Address (ARA, 0001_1001, 25h) for SMBus and PMBus, not used for I²C
1
7+1
S ALERT Addr_1
1
7+1
1
A Slave_Address_1
A
8
PEC
11
AP
Optional 9 Bits for SMBus/PMBus
NOT used in I²C
FIGURE 36. SMBus/PMBus/I²C PROTOCOL
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FN8575.1
August 13, 2015