MCP4431 Microchip Technology Inc., MCP4431 Datasheet - Page 42

• Manufacturer Part Number: MCP4431
• Description: 7/8-bit Volatile Quad Digital Pot With I 2c Interface
• Manufacturer: Microchip Technology Inc.

MCP443X/5X
4.2
The device memory supports 16 locations that are 9-bit
wide (16x9 bits). This memory space contains only
volatile locations (see
4.2.1
There are six Volatile Memory locations. These are:
• Volatile Wiper 0
• Volatile Wiper 1
• Volatile Wiper 2
• Volatile Wiper 3
• Terminal Control (TCON0) Register 0
• Terminal Control (TCON)1 Register 1
TABLE 4-2:
DS22267A-page 42
0Bh - 0Fh Reserved
Note 1:
Address
0Ah
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
Memory Map
This command on this address will generate an error condition. To exit the error condition, the user must
take the HVC pin to the V
VOLATILE MEMORY (RAM)
Volatile Wiper 0
Volatile Wiper 1
Reserved
Reserved
Volatile
TCON0 Register
Reserved
Volatile Wiper 2
Volatile Wiper 3
Reserved
Reserved
Volatile
TCON1 Register
Function
MEMORY MAP AND THE SUPPORTED COMMANDS
Table
4-2).
Memory
Type
RAM
RAM
RAM
RAM
RAM
RAM
IH
—
—
—
—
—
—
level and then back to the active state (V
Increment, Decrement
Increment, Decrement
Increment, Decrement
Increment, Decrement
Allowed Commands
Read, Write,
Read, Write,
Read, Write,
Read, Write,
Read, Write
Read, Write
None
None
None
None
None
None
The volatile memory starts functioning at the RAM
retention voltage (V
shown in
TABLE 4-1:
-502
-103
-503
-104
Resistance
Code
Disallowed Commands
Table
Increment, Decrement
Increment, Decrement
R
100.0 k
4-1.
10.0 k
50.0 k
Typical
AB
5.0 k
IL
STANDARD SETTINGS
or V
RAM
Value
All
All
All
All
All
All
—
—
—
—
IHH
). The POR/BOR Wiper code is
 2010 Microchip Technology Inc.
).
POR Wiper
Mid scale
Mid scale
Mid scale
Mid scale
Default
Setting
(1)
8-bit
7-bit
8-bit
7-bit
8-bit
7-bit
8-bit
7-bit
Initialization
Factory
8-bit 7-bit
80h
80h
80h
80h
1FFh
1FFh
—
—
—
—
—
—
Wiper
Code
80h
40h
80h
40h
80h
40h
80h
40h
40h
40h
40h
40h