MCP4014 MICROCHIP [Microchip Technology], MCP4014 Datasheet - Page 33

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

5.2.4
This mode is achieved by initializing the U/D pin to a
low state (V
CS pin. Subsequent rising edges of the U/D pin
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 remain high (V
should be forced to V
transitions on the U/D pin do not cause the wiper
setting to increment. Driving the CS pin to V
occur as soon as possible (within device specifications)
after the last desired increment occurs.
FIGURE 5-4:
© 2006 Microchip Technology Inc.
Note:
Figure
IL
DECREMENT (FOR MCP402X
COMPATIBILITY)
This command allows compatibility with
the MCP402X family, which supports
updating of the non-volatile wiper setting.
) prior to achieving a low state (V
5-4.
Wiper
U/D
CS
Decrement (For MCP402X Compatibility).
IH
to ensure that “unexpected”
V
IL
V
IH
IL
), and the CS pin
X
1
X-1
IH
IL
) on the
should
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
Note:
The wiper value will not underflow. That is,
once the wiper value equals 0x00,
subsequent decrement commands are
ignored.
MCP4011/2/3/4
5
6
V
IH
V
IH
IH
(from V
DS21978C-page 33
IL
), any other