MCP4161-502E/SN Microchip Technology, MCP4161-502E/SN Datasheet - Page 45

• Manufacturer Part Number: MCP4161-502E/SN
• Description: IC POT DGTL SNGL 5K SPI 8SOIC
• Manufacturer: Microchip Technology

Specifications of MCP4161-502E/SN

• Package / Case: 8-SOIC (3.9mm Width)
• Taps: 257
• Resistance (ohms): 5K
• Number Of Circuits: 1
• Temperature Coefficient: 150 ppm/°C Typical
• Memory Type: Non-Volatile
• Interface: SPI Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Resistance In Ohms: 5K
• Number Of Pots: Single
• Taps Per Pot: 256
• Resistance: 5 KOhms
• Wiper Memory: Non Volatile
• Digital Interface: Serial (4-Wire, SPI)
• Operating Supply Voltage: 2.5 V, 3.3 V, 5 V
• Supply Current: 550 uA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

7.0
The MCP4XXX’s SPI command format supports 16
memory address locations and four commands. Each
command has two modes. These are:
• Normal Serial Commands
• High-Voltage Serial Commands
Normal serial commands are those where the CS pin is
driven to V
CS pin is driven to V
possible commands. These commands are shown in
Table
The 8-bit commands
ment Wiper
see
and
and a Data Byte. The Command Byte contains two data
bits, see
Table 7-2
memory location and the corresponding values on the
SDI and SDO pins.
Table 7-3
and their interaction with other device features.
FIGURE 7-1:
© 2008 Microchip Technology Inc.
D
A
3
Write Data
Figure
Memory
Address
7-1.
A
D
2
8-bit Command
Command Byte
Figure
DEVICE COMMANDS
shows an overview of all the SPI commands
A
D
shows the supported commands for each
1
IL
7-1, while 16-bit commands
. With High-Voltage Serial Commands, the
A
D
0
commands) contain a Command Byte,
Command
7-1.
commands) contain a Command Byte
C
1
Bits
C
0
IHH
(Increment Wiper
General SPI Command Formats.
D
Data
Bits
9
. In each mode, there are four
D
8
A
D
3
Memory
Address
D
A
2
(Read Data
and
Command Byte
D
A
1
Decre-
D
A
0
Command
MCP414X/416X/424X/426X
C
1
Bits
C
16-bit Command
0
D
9
D
8
7.1
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,
Incremented (wiper setting +1) or Decremented (wiper
setting -1). The Increment and Decrement commands
are only valid on the volatile wiper registers, and in
High Voltage commands to enable/disable WiperLock
Technology and Software Write Protect.
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 state (see Section 7.3 “Error Condi-
tion”). The 8th bit state depends on the the command
selected.
TABLE 7-1:
D
C1:C0
States
7
11
00
01
10
Bit
Note 1: High Voltage Increment and Decrement
D
6
D
5
Data
Bits
Data Byte
Command Byte
Command
Read Data
Write Data
Increment
Decrement
D
4
commands on select non-volatile memory
locations
Technology and the software Write
Protect feature.
D
3
D
2
Table
COMMAND BIT OVERVIEW
(1)
D
1
(1)
D
0
7-1. C1:C0 determines if the
enable/disable
16-Bits Both
16-Bits Both
8-Bits
8-Bits
Bits
# of
Command
Figure
Bits
C C
1 0
1 0 = DECR
1 1 = Read Data
0 0 = Write Data
0 1 = INCR
Operates on
Volatile/
Non-Volatile
memory
Volatile Only
Volatile Only
DS22059B-page 45
7-1. Currently
WiperLock