MCP46XXEV Microchip Technology, MCP46XXEV Datasheet - Page 19

• Manufacturer Part Number: MCP46XXEV
• Description: MCP46XX Evaluation Board DEVTOOL - Analog
• Manufacturer: Microchip Technology
• Series: -r

Specifications of MCP46XXEV

• Main Purpose: Digital Potentiometer
• Embedded: No
• Utilized Ic / Part: MCP4661
• Primary Attributes: Devices Supported MCP4631, Mcp4641, Mcp4651, MCP4661
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FIGURE 2-4:
FIGURE 2-5:
© 2010 Microchip Technology Inc.
S
S
Note 1:
Note 1: Master Device is responsible for A / A signal. If an A signal occurs, the MCP45XX/46XX will
0 1 0
0 1 0
Fixed
Address
Fixed
Address
0 1 0
S
2: The Master Device will Not Acknowledge, and the MCP45XX/46XX will release the bus so the
3: The MCP45XX/46XX retains the last “Device Memory Address” that it has received. This is
Control Byte
Control Byte
0 1 0
Fixed
Address
abort this transfer and release the bus.
Master Device can generate a Stop or Repeated Start condition.
the MCP45XX/46XX does not “corrupt” the “Device Memory Address” after Repeated Start or
Stop conditions.
1
1
Control Byte
Increment and Decrement Commands (INCR or DECR) only function when accessing the
volatile wiper registers (AD3:AD0 = 0h and 1h).
Control Byte
1
MCP46XX I
MCP46XX I
A2 A1 A0 0
A2 A1 A0 0
Variable
Address
Variable
Address
A2 A1 A0 1
1
A2 A1 A0 0
Variable
Address
Write bit
Write bit
2
2
C Single Read Command Format.
C Single Increment / Decrement Command Format.
Read bit
A
A
A
AD AD AD AD
AD AD AD AD
3
Write bit
3
Device
Memory
Address
Device
Memory
Address
0 0
A
2
2
INCR Command
DECR Command
AD AD AD AD
3
1
1
Device
Memory
Address
0
2
0
0
READ Command
Command
Command
0
1
0
1
0
0
1 x
0 X X A P
Installation and Operation
Command
0 0 D8 A
1
X A P
1
STOP bit
STOP bit
x X A Sr
Read bits
1
D7 D6 D5 D4
Read Data bits
Repeated Start bit
D3
Command
D2 D1 D0 A
Bits
C C
1 0
1 0 = DECR
1 1 = Read Data
0 0 = Write Data
0 1 = INCR
DS51929A-page 19
STOP bit
2
P