MAX5395 MAXIM [Maxim Integrated Products], MAX5395 Datasheet - Page 14

• Manufacturer Part Number: MAX5395
• Description: Single, 256-Tap Volatile, I2C, Low-Voltage Linear Taper Digital Potentiometer
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 3. I
The data byte writes to the wiper register and the
potentiometer moves to the appropriate position. D[7:0]
indicates the position of the wiper. D[7:0] = 0x00 moves
the wiper to the position closest to L. D[7:0] = 0xFF
moves the wiper closest to H. D[7:0] = 0x80 following
power-on.
Removes any existing shutdown condition. Connects
all potentiometer terminals and returns the wiper to the
value stored in the wiper register. The command does
not affect the current status of the charge pump.
Opens the H terminal and maintains the wiper at the
wiper register location. Writes cannot be made to the
wiper register while shutdown mode is engaged. Clearing
shutdown mode will close the H terminal and allow the
wiper register to be written. A RST will also deassert
shutdown mode and return the wiper to midscale (0x80).
This command does not affect the charge-pump status.
Moves wiper to zero-scale position (0x00) and opens the
H terminal. The wiper register remains unaltered. Writes
SD_H_WREG
SD_L_WREG
SD_H_ZERO
SD_H_FULL
SD_L_ZERO
COMMAND
SD_L_FULL
SD_H_MID
SD_L_MID
SD_CLR
QP_OFF
QP_ON
WIPER
SD_W
Single, 256-Tap Volatile, I
RST
2
C Write Command Byte Summary
S
A6 A5 A4 A3 A2 A1 A0 R/W
ADDRESS BYTE
See Table 1
SD_H_WREG Command
SD_H_ZERO Command
SD_CLR Command
WIPER Command
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A
C7 C6 C5 C4 C3 C2 C1 C0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
Taper Digital Potentiometer
0
0
0
0
0
0
0
0
0
0
0
0
0
1
COMMAND BYTE
0
0
0
0
0
0
0
0
0
0
0
1
1
0
cannot be made to the wiper register while shutdown
mode is engaged. Clearing shutdown mode will return
the wiper to the position contained in the wiper register
and close the H terminal. A RST will also deassert
shutdown mode and return the wiper to midscale (0x80).
This command does not affect the charge-pump status.
Moves wiper to midscale position (0x80) and opens the
H terminal. The wiper register remains unaltered. Writes
cannot be made to the wiper register while shutdown
mode is engaged. Clearing shutdown mode will return
the wiper to the position contained in the wiper register
and close the H terminal. A RST will also deassert
shutdown mode and return the wiper to midscale (0x80).
This command does not affect the charge-pump status.
Moves wiper to full-scale position (0xFF) and opens the
H terminal. The wiper register remains unaltered. Writes
cannot be made to the wiper register while shutdown
mode is engaged. Clearing shutdown mode will return
the wiper to the position contained in the wiper register
and close the H terminal. A RST will also deassert
shutdown mode and return the wiper to midscale (0x80).
This command does not affect the charge-pump status.
0
0
1
1
1
1
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
1
1
1
1
0
0
0
0
C, Low-Voltage Linear
0
0
0
0
0
0
0
0
0
0
1
0
0
0
X
0
0
0
0
1
1
0
0
1
1
0
0
0
X
0
0
0
1
0
1
0
1
0
1
0
1
0
A
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
DATA BYTE
Don’t Care
SD_H_FULL Command
SD_H_MID Command
MAX5395
A P
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