ltc6803g-3 Linear Technology Corporation, ltc6803g-3 Datasheet - Page 21

• Manufacturer Part Number: ltc6803g-3
• Description: Ltc6803-1/ltc6803-3 - Multicell Battery Stack Monitor
• Manufacturer: Linear Technology Corporation

OPERATION
Table 2. Protocol Key
See Serial Command examples.
Table 6. Command Codes and PEC Bytes
COMMAND DESCRIPTION
Write Configuration Register Group
Read Configuration Register Group
Read All Cell Voltage Group
Read Cell Voltages 1-4
Read Cell Voltages 5-8
Read Cell Voltages 9-12
Read Flag Register Group
Read Temperature Register Group
Start Cell Voltage ADC Conversions and Poll Status
Table 3. Broadcast Poll Command
Table 4. Broadcast Read
Table 5. Broadcast Write
8
Command
8
Command
8
Command
PEC
...
N
Packet Error Code
Number of Bits
Continuation of Protocol
8
PEC
8
PEC
8
PEC
8
Data Byte Low
8
Data Byte Low
Poll Data
Master-to-Slave
Slave-to-Master
Complete Byte of
Data
…
…
…
…
NAME
WRCFG
RDCFG
RDCV
RDCVA
RDCVB
RDCVC
RDFLG
RDTMP
STCVAD
8
Data Byte High
8
Data Byte High
Revision Code: The diagnostic register group contains a
2-bit revision code. If software detection of device revision
is necessary, 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.
Bus Protocols: There are 3 different protocol formats,
depicted in Table 3 through Table 5. Table 2 is the key for
reading the protocol diagrams.
All
Cell 1
Cell 2
Cell 3
Cell 4
Cell 5
Cell 6
Cell 7
Cell 8
Cell 9
Cell 10
Cell 11
Cell 12
Clear (FF)
Self Test1
Self Test2
8
PEC
8
PEC
LTC6803-1/LTC6803-3
CODE
01
02
04
06
08
0A
0C
0E
10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F
8
Shift Byte 1
8
Shift Byte 1
…
…
…
…
PEC
C7
CE
DC
D2
F8
F6
E4
EA
B0
B7
BE
B9
AC
AB
A2
A5
88
8F
86
81
94
93
9A
9D
8
Shift Byte N
8
Shift Byte N
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