X3100-01 Datasheet, PDF (28/41 Pages) Intersil Corporation – Cell Balancing Control

X3100, X3101
Write Configuration Register (WCFIG)
The Write Configuration Register (WCFIG) instruc-
tion updates the static part of the Configuration Reg-
ister. 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 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, before subsequent
commands. The operation of the WCNTRL command
is shown in Figure 15.
Figure 14. Write Configuration Register (WCFIG) Operation Sequence
CS
SCK
SI
0123456789
20 21 22 23
WCFIG Instruction
(1 BYTE)
Configuration
Register Data
15 14
3210
(2 BYTE)
High Impedance
SO
Figure 15. Write Control Register (WCNTR) Operation Sequence
CS
SCK
SI
SO
Control
Bits
0123456789
18 19 20 21 22 23
WCNTR Instruction
(1 Byte)
High Impedance
Control
Register Data
15 14
543210
(2 Byte)
Old Control Bits
New Control Bits
28
FN8110.1
January 3, 2008