MCP4331 Microchip Technology Inc., MCP4331 Datasheet - Page 51

• Manufacturer Part Number: MCP4331
• Description: 7/8-bit Quad Spi Digital Pot With Non-volatile Memory
• Manufacturer: Microchip Technology Inc.

TABLE 7-3:
© 2009 Microchip Technology Inc.
Write Data
Read Data
Increment Wiper
Decrement Wiper
High Voltage
High Voltage
High Voltage
High Voltage
Modify Write Protect or Wiper-
Lock Technology (High Voltage)
Enable
Modify Write Protect or Wiper-
Lock Technology (High Voltage)
Disable
Note 1: This command will only complete if wiper is “unlocked” (WiperLock Technology is Disabled).
2: If the command is executed using address 02h, 03h, 08h, or 09h then that corresponding wiper is locked or
3: If the command is executed using with address 02h, 03h, 08h, or 09h, then that corresponding wiper is
Command Name
if with address 0Fh, then Write Protect is enabled.
unlocked or if with address 0Fh, then Write Protect is disabled.
Write Data
Read Data
Increment Wiper
Decrement Wiper
COMMANDS
-
-
16-Bits
16-Bits
16-Bits
16-Bits
8-Bits
8-Bits
8-Bits
8-Bits
8-Bits
8-Bits
Bits
# of
EEPROM
Value in
Writes
Yes
Yes
—
—
—
—
—
—
—
—
(1)
(2)
(3)
Operates on
Non-Volatile
Volatile Only
Volatile Only
Volatile Only
Volatile Only
Non-Volatile
Non-Volatile
memory
Volatile/
Only
Only
Both
Both
Both
Both
(2)
(3)
(V
CS pin?
Voltage
High
IHH
MCP434X/436X
Yes
Yes
Yes
Yes
Yes
Yes
—
—
—
—
) on
unprotected
WiperLock or
Write Protect
protected
unlocked
unlocked
unlocked
unlocked
unchanged
unchanged
unchanged
unchanged
Impact on
unlocked/
locked/
(1)
(1)
(1)
(1)
(2)
DS22233A-page 51
(3)
“locked”?
Wiper is
Works
when
Yes
Yes
Yes
No
No
No
No
No
No
No