MCP434X MICROCHIP [Microchip Technology], MCP434X Datasheet - Page 59
![no-image](/images/no-image-200.jpg)
MCP434X
Manufacturer Part Number
MCP434X
Description
7/8-Bit Quad SPI Digital POT with Non-Volatile Memory
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.MCP434X.pdf
(80 pages)
- Current page: 59 of 80
- Download datasheet (3Mb)
7.8.2
Continuous Decrements are possible only when writing
to the volatile memory registers (address 00h, 01h, and
04h).
Figure 7-9
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 7-4
Command vs. the current volatile wiper value.
FIGURE 7-9:
© 2009 Microchip Technology Inc.
SDI
SDO
A
D
3
1
1
1
1
for additional information on the Decrement
Note 1: Only functions when writing the volatile wiper registers (AD3:AD0) 0h and 1h.
(DECR COMMAND (n-1))
shows a continuous Decrement sequence
CONTINUOUS DECREMENTS
A
D
2
1
1
1
1
COMMAND BYTE
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
A
D
1
1
1
1
1
condition is cleared (the CS pin is forced to the inactive state).
D
A
0
1
1
1
1
Continuous Decrement Command - SDI and SDO States.
1
1
1
1
1
0
1 1* 1
1
1
1
X
0
1
1
X
0
1
1
A
D
3
1
0
1
1
(DECR COMMAND (n-1))
A
D
2
1
0
1
1
COMMAND BYTE
D
A
1
1
1
1
0
D
A
0
1
0
1
1
1
1
0
1
1
0
1 1* 1
0
1
1
Decrement commands can be sent repeatedly without
raising CS until a desired condition is met. The value in
the Volatile Wiper register can be read using a Read
Command
Non-Volatile Wiper EEPROM using a Write Command.
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.
X
0
0
1
X
0
0
1
D
A
3
1
0
0
1
(DECR COMMAND (n-1))
D
A
and
2
1
0
0
1
MCP434X/436X
COMMAND BYTE
D
A
1
1
0
0
1
written
A
D
0
1
0
0
1
1
1
0
0
1
0
1 1* 1 Note 1, 2
0
0
1
to
X
0
0
0
the
IH
DS22233A-page 59
X
0 Note 3, 4
0 Note 3, 4
0 Note 3, 4
to ensure that
corresponding
IH
Related parts for MCP434X
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PIC18F2480](/images/no-image3.png)
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC18F2682-I/PT](/images/no-image3.png)
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![MCP4024](/images/no-image3.png)
Part Number:
Description:
Low-Cost NV Digital POT with WiperLock Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC12F1516](/images/no-image3.png)
Part Number:
Description:
28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC12F1822](/images/no-image3.png)
Part Number:
Description:
8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC12F1840](/images/no-image3.png)
Part Number:
Description:
8-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC12F635-E/MD](/images/no-image3.png)
Part Number:
Description:
8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC12F683-E/MD](/images/no-image3.png)
Part Number:
Description:
8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![TC1263](/images/no-image3.png)
Part Number:
Description:
500mA Fixed Output CMOS LDO with Shutdown
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![TC1268](/images/no-image3.png)
Part Number:
Description:
500mA Fixed Output, Fast Response CMOS LDO with Shutdown
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![TC4405](/images/no-image3.png)
Part Number:
Description:
1.5A Dual Open-Drain MOSFET Drivers
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![TC4428](/images/no-image3.png)
Part Number:
Description:
1.5A DUAL HIGH-SPEED POWER MOSFET DRIVERS
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![MCP41100](/images/no-image3.png)
Part Number:
Description:
Single/Dual Digital Potentiometer with SPI Interface
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet: