X3100 Xicor, X3100 Datasheet - Page 23

• 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
Table 30. X3100/X3101 Instruction Set
Write Enable/Write Disable (WREN/WRDI)
Any write to a nonvolatile array or register, requires the
WREN command be sent prior to the write command.
This command sets an internal latch allowing the write
Figure 11. EEPROM Write Enable Latch (WREN/WRDI) Operation Sequence
*Instructions have the MSB in leftmost position and are transferred MSB first.
EEREAD STAT
Instruction
EEWRITE
EEREAD
RDSTAT
WCNTR
SET IDL
WCFIG
WREN
Name
WRDI
Instruction
0000 0110
0000 0100
0000 0010
0000 0101
0000 0011
0000 1001
0000 1010
0000 1011
0000 0001
Format*
SCK
SO
CS
SI
High Imped
Set the write enable latch (write enable operation)—Figure 11
Reset the write enable latch (write disable operation)—Figure 11
Write command followed by address/data (4kbit EEPROM)—Figure 12, Figure 13
Reads IDLock settings & status of EEPROM EEWRITE instruction—Figure 14
Read operation followed by address (for 4kbit EEPROM)—Figure 15
Write to configuration register followed by two bytes of data—Figure 4, Figure 16.
Data stored in SRAM only and will power-up to previous settings—Figure 3
Write to control register, followed by two bytes of data—Figure 17
Read contents of status register—Figure 18
Set EEPROM ID lock partition followed by partition byte—Figure 19
0
1
ance
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2
Instruction
(1 Byte)
3
4
5
operation to proceed. The WRDI command resets the
internal latch if the system decides to abort a write
operation. See Figure 11.
6
7
Description
Characteristics subject to change without notice.
WREN
WRDI
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