MCP4351-103E/ST

Manufacturer Part NumberMCP4351-103E/ST
DescriptionIC DGTL POT QUAD 10K 20TSSOP
ManufacturerMicrochip Technology
MCP4351-103E/ST datasheet
 


Specifications of MCP4351-103E/ST

Taps257Resistance (ohms)10K
Number Of Circuits4Temperature Coefficient150 ppm/°C Typical
Memory TypeVolatileInterfaceSPI Serial
Voltage - Supply1.8 V ~ 5.5 VOperating Temperature-40°C ~ 125°C
Mounting TypeSurface MountPackage / Case20-TSSOP
Resistance In Ohms10KLead Free Status / RoHS StatusLead free / RoHS Compliant
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7.0
DEVICE COMMANDS
The MCP43XX’s SPI command format supports
16 memory address locations and four commands.
Each command has two modes:
• Normal Serial Commands
• High-Voltage Serial Commands
Normal serial commands are those where the CS pin is
driven to V
. With high-voltage serial commands, the
IL
CS pin is driven to V
. In each mode, there are four
IHH
possible commands. These commands are shown in
Table
7-1.
The
8-bit
commands
(Increment
Decrement Wiper
commands) contain a command
byte, see
Figure
7-1, while 16-bit commands
Data
and
Write Data
commands) contain a command
byte and a data byte. The command byte contains two
data bits, see
Figure
7-1.
Table 7-2
shows the supported commands for each
memory location and the corresponding values on the
SDI and SDO pins.
Table 7-3
shows an overview of all the SPI commands
and their interaction with other device features.
8-bit Command
Command Byte
A
A
A
A
C
C
D
D
D
D
D
D
9
8
1
0
3
2
1
0
Data
Memory
Bits
Address
Command
Bits
FIGURE 7-1:
General SPI Command Formats.
 2010 Microchip Technology Inc.
7.1
Command Byte
The command byte has three fields, the address, the
command, and 2 data bits, see
only one of the data bits is defined (D8). This is for the
Write command.
The device memory is accessed when the master
sends a proper command byte to select the desired
operation. The memory location getting accessed is
contained in the command byte’s AD3:AD0 bits. The
action desired is contained in the command byte’s
C1:C0 bits, see
desired memory location will be read, written,
Wiper
and
incremented (wiper setting +1) or decremented (wiper
setting -1). The Increment and Decrement commands
(Read
are only valid on the volatile wiper registers.
As the command byte is being loaded into the device
(on the SDI pin), the device’s SDO pin is driving. The
SDO pin will output high bits for the first six bits of that
command. On the 7th bit, the SDO pin will output the
CMDERR
bit
Condition”). The 8th bit state depends on the
command selected.
TABLE 7-1:
C1:C0
Bit
Command
States
Read Data
11
Write Data
00
Increment
01
Decrement
10
16-bit Command
Command Byte
Data Byte
A
A
A
A
C
C
D
D
D
D
D
D
D
D
D
D
9
8
7
6
5
4
1
0
3
2
1
0
Data
Memory
Bits
Address
Command
Bits
MCP433X/435X
Figure
7-1. Currently
Table
7-1. C1:C0 determines if the
state
(see
Section 7.3
“Error
COMMAND BIT OVERVIEW
Operates on
# of
Volatile/
Bits
Nonvolatile
memory
16-Bits Both
16-Bits Both
8-Bits
Volatile Only
8-Bits
Volatile Only
D
D
D
D
Command
3
2
1
0
Bits
C C
1 0
0 0 = Write Data
0 1 = INCR
1 0 = DECR
1 1 = Read Data
DS22242A-page 51