MCP4023 Microchip Technology, MCP4023 Datasheet - Page 38

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

MCP4021/2/3/4
5.2.9
This mode is achieved by initializing the U/D pin to the
low state (V
Subsequent rising edges of the U/D pin decrement the
wiper setting toward terminal B. Set the U/D pin to a
high state (V
begins a write cycle and enables the WiperLock
Technology feature (See
FIGURE 5-9:
DS21945E-page 38
WiperLock™ Technology
HIGH-VOLTAGE DECREMENT AND
ENABLE WiperLock TECHNOLOGY
IH
IL
) prior to driving the CS pin to V
) prior to forcing the CS pin to V
EEPROM
High-Voltage Decrement and Enable WiperLock™ Technology.
Figure
Wiper
U/D
CS
5-9).
V
V
IH
IL
V
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 underflow. That is,
once the wiper value equals 0x00,
subsequent decrement commands are
ignored.
t
WC
WiperLock Technology Enable
WiperLock Technology Disable
V
X-4
DD
© 2006 Microchip Technology Inc.
5
IH
6
(from V
V
V
IH
IH
IHH
), all other