MCP4142 Microchip Technology Inc., MCP4142 Datasheet - Page 50

• Manufacturer Part Number: MCP4142
• Description: 7/8-bit Single/dual Spi Digital Pot With Volatile Memory
• Manufacturer: Microchip Technology Inc.

MCP414X/416X/424X/426X
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:
DS22059A-page 50
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).
D
D
D
A
A
A
3
1
3
1
3
1
A
D
A
D
A
D
2
1
2
1
2
1
COMMAND BYTE
A
D
A
D
A
D
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
7
1
7
1
7
1
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
D
D
D
2
1
2
1
2
1
D
D
D
1
1
1
1
1
1
© 2007 Microchip Technology Inc.
D
D
D
0
1
0
1
0
1