LTC6804-1_15 Datasheet, PDF (43/74 Pages) Linear Technology – Multicell Battery Monitors

LTC6804-1/LTC6804-2
Operation
Table 24. PEC Calculation for 0x0001
PEC[14]
00000000001111100
0
PEC[13]
00000000010000110
0
PEC[12]
00000000100001101
1
PEC[11]
00000001000011011
1
PEC[10]
00000010000110111
1
PEC[9]
00000100000010001
1
PEC[8]
00001000000100010
0
PEC[7]
00010000000111011
1
PEC[6]
00100000000001000
0
PEC[5]
01000000000010001
1
PEC[4]
10000000000100011
1
PEC[3]
00000000000111000
0
PEC[2]
00000000000001111
1
PEC[1]
00000000000011111
1
PEC[0]
00000000000111111
1
IN14
0000000001111100
0
IN10
0000010000110111
PEC Word
IN8
0001000000100010
IN7
0010000000111011
IN4
0000000000100011
IN3
0000000000111000
IN0
0000000000111111
DIN
0000000000000001
Clock Cycle
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Table 25. Write/Read PEC Format
NAME
RD/WR
BIT 7
PEC0
RD/WR
PEC[14]
PEC1
RD/WR
PEC[6]
BIT 6
PEC[13]
PEC[5]
BIT 5
PEC[12]
PEC[4]
BIT 4
PEC[11]
PEC[3]
BIT 3
PEC[10]
PEC[2]
BIT 2
PEC[9]
PEC[1]
BIT 1
PEC[8]
PEC[0]
BIT 0
PEC[7]
0
two daisy-chained devices (primary device P, stacked
device S), the primary device sends out data on port A in
the following order:
STBR0(P), …, STBR5(P), PEC0(P), PEC1(P), STBR0(S),
… , STBR5(S), PEC0(S), PEC1(S)
Address Commands (LTC6804-2 Only)
Broadcast Commands (LTC6804-1 or LTC6804-2)
A broadcast command is one to which all devices on the
bus will respond, regardless of device address. This com-
mand format can be used with LTC6804-1 and LTC6804-2
parts. See Bus Protocols for Broadcast command format.
With broadcast commands all devices can be sent com-
mands simultaneously.
An address command is one in which only the addressed
device on the bus responds. Address commands are used
only with LTC6804-2 parts. All commands are compatible
with addressing. See Bus Protocols for Address command
format.
680412fb
For more information www.linear.com/LTC6804-1
43