X3100 Datasheet, PDF (28/40 Pages) Xicor Inc. – 3 or 4 Cell Li-Ion Battery Protection and Monitor IC

X3100/X3101 – Preliminary Information
Read Status Register (RDSTAT)
The Read Status Register (RDSTAT) command returns
the status of the X3100 or X3101. The Status Register
contains three bits that indicate whether the voltage
regulator is stabilized, and if there are any protection
failure conditions. The operation of the RDSTAT
instruction is shown in Figure 18.
Set ID Lock (SET IDL)
The contents of the EEPROM memory array in the
X3100 or X3101 can be locked in one of eight
configurations using the SET ID lock command. When a
section of the EEPROM array is locked, the contents
cannot be changed, even when a valid write operation
attempts a write to that area. The SET IDL command
operation is shown in Figure 19.
Figure 18. Read Status Register (RDSTAT) Operation Sequence
CS
SCK
SI
SO
0 1 2 3 4 5 6 7 8 ^{9 10 11 12 13 14 15}
RDSTAT
Instruction
(1 Byte)
High Impedance
210
Status Register Output
Figure 19. EEPROM IDLock (SET IDL) Operation Sequence
CS
SCK
SI
SO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Set IDL
Instruction
High Impedance
IDLock
Byte
I II
D DD
L LL
2 10
REV 1.1.8 12/10/02
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