MCP4532 MICROCHIP [Microchip Technology], MCP4532 Datasheet - Page 59

• Manufacturer Part Number: MCP4532
• Description: 7/8-Bit Single/Dual I2C Digital POT with Volatile Memory
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 7-4:
FIGURE 7-5:
© 2008 Microchip Technology Inc.
S
Note 1: Master Device is responsible for A / A signal. If a A signal occurs, the MCP45XX/46XX will
Note 1: Master Device is responsible for A / A signal. If a A signal occurs, the MCP45XX/46XX will
0 1 0
0 1 0
Fixed
Address
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 the
4: The Device Memory Address pointer defaults to 00h on POR and BOR conditions.
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
0 1 0
Control Byte
Fixed
Address
abort this transfer and release the bus.
Master Device can generate a Stop or Repeated Start condition.
MCP45XX/46XX does not “corrupt” the “Device Memory Address” after Repeated Start or
Stop conditions.
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.
Control Byte
1
I
Control Byte
1
I
2
2
C Read (Last Memory Address Accessed).
C Random Read.
A2 A1 A0 1 A
Variable
Address
A2 A1 A0 1
1
A2 A1 A0 0
Variable
Address
Read bit
Read bit
A
Write bit
0
0
A
0
0
AD AD AD AD
3
MCP453X/455X/463X/465X
0
Device
Memory
Address
0
2
READ Command
0
0
1
0
0
0
0
0
Command
1
0 D8 A
0 D8 A
1
Read bits
x X A Sr
Read bits
1
1
D7 D6 D5 D4
Read Data bits
D7 D6 D5 D4
Read Data bits
Repeated Start bit
D3
D3
D2 D1 D0 A
D2 D1 D0 A
DS22096A-page 59
STOP bit
STOP bit
2
2
P
P