X3100 Xicor, X3100 Datasheet - Page 27

• Manufacturer Part Number: X3100
• Description: 3 or 4 Cell Li-Ion Battery Protection and Monitor IC
• Manufacturer: Xicor

X3100/X3101 – Preliminary Information
REV 1.1.8 12/10/02
Write Configuration Register (WCFIG)
The Write Configuration Register (WCFIG) instruction
updates the static part of the Configuration Register.
These new values take effect immediately, for example
writing a new Over-discharge voltage limit. However, to
make these changes permanent, so they remain if the
cell voltages are removed, an EEWRITE operation to
the EEPROM array is required following the WCFIG
command. This command is shown in Figure 16.
Figure 16. Write Configuration Register (WCFIG) Operation Sequence
Figure 17. Write Control Register (WCNTR) Operation Sequence
SCK
CS
SO
Control
SI
SCK
Bits
CS
SO
SI
High Impedance
High Impedance
0
0
1
WCFIG Instruction
1
2
WCNTR Instruction
(1 BYTE)
Old Control Bits
2
3
(1 Byte)
3
4
4
5
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5
6
6
7
15 14
7
8
15 14
Write Control Register (WCNTRL)
The Write Control Register (WCNTRL) instruction
updates the contents of the volatile Control Register.
This command sets the status of the FET control pins,
the cell balancing outputs, the current sense gain and
external entry to the sleep mode. Since this instruction
controls a volatile register, no other commands are
required and there is no delay time needed after the
instruction,
operation of the WCNTRL command is shown in
Figure 17.
8
9
Register Data
Configuration
(2 BYTE)
9
Register Data
Control
(2 Byte)
20 21 22 23
3
before
18 19 20 21
5
2
4
New Control Bits
1
Characteristics subject to change without notice.
3
0
subsequent
2
22 23
1
0
commands. The
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