ISL78610 Datasheet, PDF (77/98 Pages) Intersil Corporation – Multi-Cell Li-Ion Battery Manager

ISL78610
TABLE 47. SUMMARY OF FAULT DIAGNOSTICS COMMANDS AND RESPONSES (Continued)
DIAGNOSTIC
ITEM FUNCTION
ACTION REQUIRED
REGISTER READ/WRITE
COMMENTS
12
Set fault filter sample value Write TOT Bits in Fault Default is 3'b011 (8 samples)
Setup register
13
Identify which inputs have Write Cell Setup register A '0' bit value indicates cell is connected. A '1' bit value indicates no cell
cells connected
connected to this input. The undervoltage test is not applied to
unconnected cells.
14
Scan cell voltages
Send Scan Voltages
A cell undervoltage condition is flagged after a number of sequential
command
undervoltage conditions are recorded for a single cell. The number is
programmed above in item 12.
15
Check fault status
Read Fault Status register The device sends the Fault Status register contents automatically if a
fault is detected, if the register value is zero before the fault is detected.
16
Check undervoltage fault Read Undervoltage Fault Only required if the Fault Status register returns a fault condition.
register
register
17
Reset fault bits
18
Reset fault filter
Reset bits in Undervoltage Fault register followed by bits in Fault Status
register.
Change the value of the [TOT2:0] bits in the Fault Setup register and
then change back to the required value. This resets the filter. The filter
is also reset if a false undervoltage test is encountered.
19 V_BAT or VSS Set fault filter sample value Write TOT bits in Fault
Connection Test
Setup register
Default is 3'b011 (8 samples)
20
Scan cell voltages
Send Scan Voltages
A open condition on V_BAT or VSS is flagged after a number of sequential
command
open conditions are recorded for a single cell. The number is
programmed above in item 19.
21
Check Fault Status
Read Fault Status register The device sends the Fault Status register contents automatically if a
fault is detected, if the register value is zero before the fault is detected.
22
Reset fault bits
23
Reset fault filter
Reset bits in the Fault Status register.
Change the value of the [TOT2:0] bits in the Fault Setup register and
then change back to the required value. This resets the filter. The filter
is also reset if a false open test is encountered.
24 Open-wire Test Set Scan current value
Write Device Setup
register: ISCN = 1 or 0
Sets scan current to 1mA (recommended) by setting ISCN = 1. Or, set
the scan current to 150µA by setting ISCN = 0.
25
Identify which inputs have Write Cell Setup register A '0' bit value indicates cell is connected. A '1' bit value indicates no cell
cells connected
connected to this input. Cell inputs VC2 to VC12: the open-wire
detection system is disabled for cell inputs with a '1' setting in the Cell
Setup register. Cell inputs VC0 and VC1 are not affected by the Cell
Setup register.
26
Activate Scan Wires function Send Scan Wires
Wait for Scan Wires to complete.
command
27
Check Fault Status
Read Fault Status register The device sends the Fault Status register contents automatically if a
fault is detected, if the register value is zero before the fault is detected.
28
Check Open-Wire Fault
Read Open-Wire Fault Only required if the Fault Status register returns a fault condition.
register
register
29
Reset fault bits
Reset bits in Open-Wire Fault register followed by bits in Fault Status
register.
30 Over-
temperature
Indication
Set external temperature Write External Temp Limit Full scale value 14'h3FFF = 2.5V
limit
register
31
Identify which inputs are Write Fault Setup register A '1' bit value indicates input is tested. A '0' bit value indicates input is
required to be tested
Bits TST1 to TST4
not tested.
32
Scan temperature inputs Send Scan Temperatures An over-temperature condition is flagged immediately if the input
command
voltage is below the limit value.
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June 16, 2016