MCP4331 Microchip Technology Inc., MCP4331 Datasheet - Page 53

• Manufacturer Part Number: MCP4331
• Description: 7/8-bit Quad Spi Digital Pot With Non-volatile Memory
• Manufacturer: Microchip Technology Inc.

7.5.3
Continuous writes are possible only when writing to the
volatile memory registers (address 00h, 01h, and 04h).
Figure 7-3
writes. The writes do not need to be to the same volatile
memory address.
FIGURE 7-3:
© 2009 Microchip Technology Inc.
Note 1: If a Command Error (CMDERR) occurs at this bit location (*), then all following SDO bits will be
shows the sequence for three continuous
CONTINUOUS WRITES TO
VOLATILE MEMORY
driven low until the CS pin is driven inactive (V
SDI
SDO
Continuous Write Sequence (Volatile Memory only).
A
D
A
D
A
D
3
1
3
1
3
1
D
D
D
A
2
1
A
2
1
A
2
1
COMMAND BYTE
D
D
D
A
A
A
1
1
1
1
1
1
A
D
A
D
A
D
0
1
0
1
0
1
0
1
0
1
0
1
0
1 1* 1
0
1 1* 1
0
1 1* 1
D
D
D
9
9
9
D
D
D
8
8
8
D
D
D
1
1
1
7
7
7
IH
7.5.4
Continuous writes to non-volatile memory are not
allowed, and attempts to do so will result in a command
error (CMDERR) condition.
D
D
D
6
1
6
1
6
1
).
D
D
D
5
1
5
1
5
1
DATA BYTE
D
D
D
4
1
4
1
4
1
CONTINUOUS WRITES TO
NON-VOLATILE MEMORY
D
D
D
3
1
3
1
3
1
MCP434X/436X
D
D
D
2
1
2
1
2
1
D
D
D
1
1
1
1
1
1
D
D
D
0
1
0
1
0
1
DS22233A-page 53