MCP4014 MICROCHIP [Microchip Technology], MCP4014 Datasheet - Page 32

• Manufacturer Part Number: MCP4014
• Description: Low-Cost 64-Step Volatile Digital POT
• Manufacturer: MICROCHIP [Microchip Technology]

MCP4011/2/3/4
5.2.3
This mode is achieved by initializing the U/D pin to a low
state (V
pin. Subsequent rising edges of the U/D pin will
decrement the wiper setting toward terminal B. This is
shown in
After the wiper is decremented to the desired position,
the U/D pin should be forced low (V
should be forced to V
“unexpected” transitions on the U/D pin do not cause
the wiper setting to decrement. Driving the CS pin to
V
specifications) after the last desired increment occurs.
FIGURE 5-3:
DS21978C-page 32
IH
should occur as soon as possible (within device
IL
) prior to achieving a low state (V
Figure
DECREMENT
5-3.
Wiper
U/D
CS
Decrement.
IH
V
. This will ensure that
IL
V
IL
IL
X
) and the CS pin
1
IL
X-1
) on the CS
2
X-2
3
X-3
4
When the device voltage falls below the RAM retention
voltage of the device, the wiper state may be corrupted.
When the device returns to the operating range, the
wiper will be loaded with the default POR wiper setting.
After the CS pin is driven to V
serial command may immediately be entered.
X-4
V
IH
Note:
The wiper value will not underflow. That is,
once the wiper value equals 0x00,
subsequent decrement commands are
ignored.
5
6
© 2006 Microchip Technology Inc.
IH
V
V
(from V
IH
IL
IL
), any other