x3102v28 Intersil Corporation, x3102v28 Datasheet - Page 18

• Manufacturer Part Number: x3102v28
• Description: 3 Cell Li-ion Battery Protection And Monitor Ic
• Manufacturer: Intersil Corporation

The function of each bit in the status register is shown in
Table 18.
Bit 0 of the status register (VRGS + OCDS) actually
indicates the status of two conditions of the X3102. Voltage
Regulator Status (VRGS) is an internally generated signal
which indicates that the output of the Voltage Regulator
(VRGO) has reached an output of 5VDC ± 0.5%. In this
case, the voltage regulator is said to be “tuned”. Before the
signal VRGS goes low (i.e. before the voltage regulator is
tuned), the voltage at the output of the regulator is nominally
5VDC ± 10% (See section “Voltage Regulator” on page 26.)
Overcurrent Detection Status (OCDS) is another internally
generated signal which indicates whether or not the X3102
is in overcurrent protection mode.
Signals VRGS and OCDS are logically OR’ed together
(VRGS+OCDS) and written to bit 0 of the status register
(See Table 18, Table 17 and Figure 8).
NOTE: This bit is set in the configuration register.
BIT(S)
3-7
0
1
2
VRGS + OCDS
CCES + OVDS
NAME
UVDS
-
Voltage regulator status
18
detection status
detection status
detection status
DESCRIPTION
Over-discharge
enable status
Over-charge
Overcurrent
Cell charge
+
+
TABLE 18. STATUS REGISTER FUNCTIONALITY
SWCEN = 0
SWCEN = 1
CASE
(Note)
(Note)
–
-
-
X3102
STATUS
Bit 1 of the status register simply indicates whether or not the
X3102 is in over-discharge protection mode.
Bit 2 of the status register (CCES + OVDS) indicates the
status of two conditions of the X3102. Cell Charge Enable
Status (CCES) is an internally generated signal which
indicates the status of any cell voltage (V
to the Cell Charge Enable Voltage (V
Voltage Detection Status (OVDS) is an internally generated
signal which indicates whether or not the X3102 is in over-
charge protection mode.
When the cell charge enable function is switched ON
(configuration bit SWCEN = 0), the signals CCES and OVDS
are logically OR’ed (CCES + OVDS) and written to bit 2 of
the status register. If the cell charge enable function is
switched OFF (configuration bit SWCEN = 1), then bit 2 of
the status register effectively only represents information
about the over-charge status (OVDS) of the X3102 (See
Table 18, Table 17 and Figure 8).
1
0
1
0
1
0
1
0
0
V
X3102 in overcurrent protection mode.
V
X3102 NOT in overcurrent protection mode.
X3102 in over-discharge protection mode
X3102 NOT in over-discharge protection mode
V
X3102 in over-charge protection mode
V
X3102 NOT in over-charge protection mode
X3102 in over-charge protection mode
X3102 NOT in over-charge protection mode
Not used (always return zero)
RGO
RGO
CELL
CELL
not yet tuned (V
tuned (V
< V
> V
CE
CE
OR
AND
RGO
INTERPRETATION
= 5V ± 0.5%) AND
RGO
= 5V ± 10%) OR
CE
). Over-charge
CELL
) with respect
December 22, 2004
FN8246.0