MCP4014-502E/CH View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
MCP4014-502E/CH Datasheet PDF : 60 Pages
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MCP4011/2/3/4
5.2.7
HIGH-VOLTAGE DECREMENT 1
(FOR MCP402X COMPATIBILITY)
Note:
This command allows compatibility with
the MCP402X family, which supports
updating of the non-volatile wiper setting
with the WiperLock Technology feature.
This mode is achieved by initializing the U/D pin to a
low state (VIL) prior to the CS pin being driven to VIHH.
Subsequent rising edges of the U/D pin decrement the
wiper setting toward terminal B. Set the U/D pin to the
low state (VIL) prior to forcing the CS pin to VIH. This is
shown in Figure 5-7.
After the CS pin is driven to VIH (from VIL), any other
serial command may immediately be entered.
Note:
The wiper value will not underflow. That is,
once the wiper value equals 0x00,
subsequent decrement commands are
ignored.
VIHH
VIH
CS
U/D VIL
1
2
3
4
Wiper
X X-1 X-2 X-3 X-4
VIH
5
6 VIH
VIL
FIGURE 5-7:
High-Voltage Decrement 1 (For MCP402X Compatibility).
DS21978C-page 36
© 2006 Microchip Technology Inc.
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