MCP4351-103E/ST Microchip Technology, MCP4351-103E/ST Datasheet - Page 59
Manufacturer Part Number
IC DGTL POT QUAD 10K 20TSSOP
Specifications of MCP4351-103E/ST
Number Of Circuits
150 ppm/°C Typical
Voltage - Supply
1.8 V ~ 5.5 V
-40°C ~ 125°C
Package / Case
Resistance In Ohms
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The Increment command is an 8-bit command. The
Increment command can only be issued to volatile
memory locations. The format of the command is
An Increment command to the volatile memory location
changes that location after a properly formatted com-
mand (8-clocks) have been received.
Increment commands provide a quick and easy
method to modify the value of the volatile wiper location
by +1 with minimal overhead.
SDI and SDO States.
2010 Microchip Technology Inc.
Note 1: Only functions when writing the volatile
2: Valid Address/Command combination.
3: Invalid Address/Command combination
4: If a Command Error (CMDERR) occurs
Normal and High Voltage
(INCR COMMAND (n+1))
the Increment Wiper command. Other
addresses are invalid.
wiper registers (AD3:AD0) 0h and 1h.
all following SDO bits will be low until the
CMDERR condition is cleared. (the CS
pin is forced to the inactive state).
at this bit location (*), then all following
SDO bits will be driven low until the CS
pin is driven inactive (V
shows the valid addresses for
Increment Command –
1 1* 1 Note 1, 2
0 Note 1, 3
Typically, the CS pin starts at the inactive state (V
but may already be in the active state due to the
completion of another command.
waveforms for a single increment. The increment
operation requires that the CS pin be in the active state
The 8-bit Increment command (command byte) is then
clocked in on the SDI pin by the SCK pins. The SDO pin
drives the CMDERR bit on the 7th clock.
The wiper value will increment up to 100h on 8-bit
devices and 80h on 7-bit devices. After the wiper value
has reached full scale (8-bit = 100h, 7-bit = 80h), the
wiper value will not be incremented further. If the wiper
register has a value between 101h and 1FFh, the
Increment command is disabled. See
additional information on the Increment command
versus the current volatile wiper value.
The increment operations only require the Increment
command byte while the CS pin is active (V
for a single increment.
After the wiper is incremented to the desired position,
the CS pin should be forced to V
unexpected transitions on the SCK pin do not cause
the wiper setting to change. Driving the CS pin to V
should occur as soon as possible (within device
specifications) after the last desired increment occurs.
) and is driven to the active state (V
). Typically, the CS pin will be in the inactive
INCREMENT OPERATION VS.
VOLATILE WIPER VALUE
(Full Scale (W = A))
Full Scale (W = A)
W = N
W = N (Mid-scale)
W = N
Zero Scale (W = B)
to ensure that