ltc6803g-4 Linear Technology Corporation, ltc6803g-4 Datasheet - Page 21

• Manufacturer Part Number: ltc6803g-4
• Description: Ltc6803-2/ltc6803-4 - Multicell Battery Stack Monitor
• Manufacturer: Linear Technology Corporation

OPERATION
Revision Code
The diagnostic register group contains a 2-bit revision
code. If software detection of device revision is neces-
sary, then contact the factory for details. Otherwise, the
code can be ignored. In all cases, however, the values of
all bits must be used when calculating the packet error
code (PEC) byte on data reads.
Table 2. Protocol Key
Table 3. Broadcast Poll Command
Table 4. Broadcast Read
A bus collision will occur if multiple devices are on the same serial bus.
Table 5. Broadcast Write
Table 6. Address Poll Command
Table 7. Address Read
See Serial Command examples
Table 8. Address Write
8
Command
8
Command
8
Command
4
1000
4
1000
4
1000
PEC
...
N
Packet Error Code
Number of Bits
Continuation of Protocol
4
Address
4
Address
8
PEC
8
PEC
4
Address
8
PEC
8
PEC
8
PEC
8
Data Byte Low
8
Data Byte Low
8
PEC
8
Command
8
Command
Poll Data
Master-to-Slave
Slave-to-Master
Complete Byte of
Data
8
Command
…
…
…
…
8
PEC
8
PEC
8
Data Byte High
8
Data Byte High
8
PEC
Bus Protocols
There are 6 different protocol formats, depicted in Table 3
through Table 8. Table 2 is the key for reading the protocol
diagrams.
8
Data Byte Low
8
Data Byte Low
Poll Data
8
PEC
8
PEC
LTC6803-2/LTC6803-4
…
…
…
…
8
Data Byte High
8
Data Byte High
8
PEC
8
PEC
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