MCP4332-503E/ST Microchip Technology, MCP4332-503E/ST Datasheet - Page 62

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MCP4332-503E/ST

Manufacturer Part Number
MCP4332-503E/ST
Description
IC DGTL POT QUAD 50K 14TSSOP
Manufacturer
Microchip Technology
Datasheet

Specifications of MCP4332-503E/ST

Taps
129
Resistance (ohms)
50K
Number Of Circuits
4
Temperature Coefficient
150 ppm/°C Typical
Memory Type
Volatile
Interface
SPI Serial
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
14-TSSOP
Resistance In Ohms
50K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
MCP433X/435X
7.8.2
CONTINUOUS DECREMENTS
Continuous decrements are possible only when writing
to the volatile memory registers (address 00h, 01h, and
04h).
Figure 7-9
shows a continuous decrement sequence
for three continuous writes. The writes do not need to
be to the same volatile memory address.
When executing continuous Decrement commands,
the selected wiper will be altered from n to n-1 for each
Decrement command received. The wiper value will
decrement from the wiper’s full scale value (100h on
8-bit devices and 80h on 7-bit devices). Above the
wiper’s full scale value (8-bit = 101h to 1FFh,
7-bit = 81h to FFh), the Decrement command is
disabled. If the Wiper register has a zero scale value
(000h), then the wiper value will not decrement. See
Table 7-5
for additional information on the Decrement
command vs. the current volatile wiper value.
COMMAND BYTE
(DECR COMMAND (n-1))
A
A
A
A
1
0
X
X
SDI
D
D
D
D
3
2
1
0
1
1
1
1
1
1 1* 1
1
1
1
1
1
1
0
0
SDO
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Note 1: Only functions when writing the volatile wiper registers (AD3:AD0) 0h and 1h.
2: Valid Address/Command combination.
3: Invalid Address/Command combination.
4: If an Error Condition occurs (CMDERR = L), all following SDO bits will be low until the CMDERR
condition is cleared (the CS pin is forced to the inactive state).
FIGURE 7-9:
Continuous Decrement Command – SDI and SDO States.
DS22242A-page 62
Decrement commands can be sent repeatedly without
raising CS until a desired condition is met.
When executing a continuous command string, the
Decrement command can be followed by any other
valid command.
The wiper terminal will move after the command has
been received (8th clock).
After the wiper is decremented 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 decrement occurs.
COMMAND BYTE
(DECR COMMAND (n-1))
(DECR COMMAND (n-1))
A
A
A
A
1
0
X
X
A
A
D
D
D
D
D
D
3
2
1
0
3
2
1
1
1
1
1
1 1* 1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
1
1
to ensure that
IH
IH
COMMAND BYTE
A
A
1
0
X
X
D
D
1
0
1 1* 1 Note 1, 2
1
1
1
0 Note 3, 4
0
0
0
0
0
0 Note 3, 4
0
0
0
0
0
0 Note 3, 4
1
1
1
1
0
 2010 Microchip Technology Inc.

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