X3100 Xicor, X3100 Datasheet - Page 10

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

X3100/X3101 – Preliminary Information
Figure 4. Writing to Configuration Register
CONTROL REGISTER
The Control Register is realized as two bytes of volatile
RAM (Table 10, Table 11). This register is written using
the WCNTR instruction, see Table 30 and section “X3100/
X3101 SPI Serial Communication” on page 22.
Table 10. Control Register—Upper Byte
Table 11. Control Register—Lower Byte
REV 1.1.8 12/10/02
CBC4
15
SLP
Configuration Register
7
(SRAM=old value)
Power Down
EEPROM to SRAM
Data Recalled
from Shadow
CBC3
Power Up
WCFIG (New Value)
14
6
0
Data Recalled
from Shadow
EEPROM to SRAM
NO
CBC2
13
Configuration Register
Configuration Register
5
0
(Sram=New Value)
(SRAM=Old Value)
CBC1
(New Value)
Power Up
12
in Shadow
EEPROM
Data Recalled
from Shadow
EEPROM to SRAM
4
Store
x
UVPC
11
3
x
EEWRITE
Configuration Register
(SRAM=New Value)
WREN
OVPC
4kbit EEPROM
10
Power Down
YES
Power Up
2
x
Write to
Enable
Write
CSG1
9
1
x
CSG0
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8
0
x
Since the control register is volatile, data will be lost
following a power down and power up sequence. The
default value of the control register on initial power up
or when exiting the SLEEP MODE is 00h (for both
upper and lower bytes respectively). The functions that
can be manipulated by the Control Register are shown
in Table 12.
Table 12. Control Register Functionality
Sleep Control (SLP)
Setting the SLP bit to ‘1’ forces the X3100 or X3101 into
the sleep mode, if V
Mode” on page 15.
Table 13. Sleep Mode Selection
Bit(s) Name
Control Register Bits
0-4
5,6
8,9
10
11
12
13
14
15
7
CSG1,
OVPC
UVPC
CSG0
CBC1
CBC2
CBC3
CBC4
SLP
SLP
0, 0
–
0
1
(don’t care)
Reserved—write 0 to these locations.
Select sleep mode.
Select current sense voltage gain
OVP control: switch pin OVP = V
UVP control: switch pin UVP = V
CB1 control: switch pin CB1 = V
CB2 control: switch pin CB2 = V
CB3 control: switch pin CB3 = V
CB4 control: switch pin CB4 = V
Characteristics subject to change without notice.
CC
Normal operation mode
Device enters Sleep mode
< V
SLP
Function
. See section “Sleep
Operation
CC
CC
CC
CC
CC
CC
10 of 40
/V
/V
/V
/V
/V
/V
SS
SS
SS
SS
SS
SS