MCP4023 Microchip Technology, MCP4023 Datasheet - Page 35

• Manufacturer Part Number: MCP4023
• Description: Low-Cost NV Digital POT with WiperLock Technology
• Manufacturer: Microchip Technology

5.2.6
This mode is achieved by initializing the U/D pin to a
high state (V
Subsequent rising edges of the U/D pin increment the
wiper setting toward terminal A. Set the U/D pin to the
high state (V
begins a write cycle and disables the WiperLock
Technology feature (See
FIGURE 5-6:
© 2006 Microchip Technology Inc.
WiperLock™ Technology
HIGH-VOLTAGE INCREMENT AND
DISABLE WiperLock TECHNOLOGY
IH
IH
) prior to the CS pin being driven to V
) prior to forcing the CS pin to V
EEPROM
High-Voltage Increment and Disable WiperLock™ Technology.
Figure
Wiper
U/D
CS
5-6).
V
V
IH
IH
V
V
IL
X
IHH
X
1
IH
. This
X+1
X
IHH
.
2
X+2
X
3
After the CS pin is driven to V
serial commands are ignored until the EEPROM write
cycle (t
X+3
X
Note:
4
WC
X+4
X
) completes.
The wiper value will not overflow. That is,
once the wiper value equals 0x3F,
subsequent increment commands are
ignored.
t
WC
WiperLock Technology Enable
WiperLock Technology Disable
MCP4021/2/3/4
X+4
5
IH
6
(from V
V
DS21945E-page 35
V
IH
IH
IHH
), all other