ISL78610 Datasheet, PDF (60/98 Pages) Intersil Corporation – Multi-Cell Li-Ion Battery Manager

ISL78610
Response examples are shown in Figures 70A to 70D.
DEVICE
ADDRESS
(31, 28)
PAGE
(26, 24)
DATA
ADDRESS
(23, 18)
DATA
(17, 4)
CRC
(3, 0)
1 001 0001 0001 1 10 1 0 11 1 0 00 01 01 00 1 00
MSB
BYTE 3
BYTE 2
BYTE 1
BYTE 0
LSB
FIGURE 70A. DEVICE DATA RESPONSE: DEVICE 9, CELL 7 VOLTAGE = 14’h170A (3.6V)
DEVICE
ADDRESS
(31, 28)
PAGE
(26, 24)
DATA
ADDRESS
(23, 18)
ZEROS
(17, 4)
CRC
(3, 0)
1 010 0011 0011 0 00 0 0 00 0 0 00 00 00 00 1 00
MSB
BYTE 3
BYTE 2
BYTE 1
BYTE 0
LSB
FIGURE 70B. DEVICE COMMUNICATIONS ADMINISTRATION RESPONSE: DEVICE 10, ACK
DEVICE
ADDRESS
(31, 28)
PAGE
(26, 24)
DATA
ADDRESS
(23, 18)
DEVICE TYPE/
ADDRESS
(17, 4)
CRC
(3, 0)
0 000 0011 0010 0 10 0 0 00 0 0 01 10 10 00 1 10
MSB
BYTE 3
BYTE 2
BYTE 1
BYTE 0
LSB
FIGURE 70C. DEVICE COMMUNICATIONS ADMINISTRATION RESPONSE: IDENTIFY, DEVICE 4, MIDDLE STACK DEVICE
DEVICE
ADDRESS
(319, 316)
PAGE
DATA
(314, ADDRESS 0CH
312)
(311, 306)
CELL 12
DATA
(305, 292)
CRC
(291,288)
10010001001100101110000101001100
MSB _{BYTE 39}
BYTE 38
BYTE 37
BYTE 36
DATA
ADDRESS 0BH
(287, 282)
CELL 11 DATA
(281, 268)
CRC
(287, 264)
001011010111000010100001
BYTE 35
BYTE 34
BYTE 33
DATA
ADDRESS 0AH
(263, 258)
CELL 10
DATA
(257, 244)
CRC
(243, 240)
000111011110000101000001
BYTE 32
BYTE 31
BYTE 30
DATA
ADDRESS 00H
(23, 18)
PACK VOLTAGE DATA
(17, 4)
CRC
(3, 0)
000000010010100011110001
BYTE 2
BYTE 1
BYTE 0 ^LSB
FIGURE 70D. DEVICE DATA RESPONSE: DEVICE 9, READ ALL CELL VOLTAGE DATA
FIGURE 70. DAISY CHAIN DEVICE RESPONSE EXAMPLES
Communication Timing
Collecting voltage and temperature data from daisy chained
ISL78610 devices consists of three separate types of operations:
A command to initiate measurement, the measurement itself,
and a command and response to retrieve data.
Commands are the same for all types of operations, but the
timing is dependent on the number of devices in the stack, the
daisy chain clock rate, and the SPI clock rate.
Actual measurement operations occur within the device and
start with the last bit of the command byte and end with data
being placed in a register. Measurement times are dependent on
the ISL78610 internal clock. This clock has the same variations
(and is related to) the daisy chain clock.
Responses have different timing calculations, based on the
position of the addressed device in the daisy chain stack and the
daisy chain and SPI clock rates.
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FN8830.1
June 16, 2016