MAX5432LETA Ver la hoja de datos (PDF) - Maxim Integrated

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MAX5432LETA

32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers

Maxim Integrated 

32-Tap, Nonvolatile, I2C, Linear, Digital

Potentiometers

SDA

SCL

DATA STABLE, CHANGE OF

DATA VALID DATA ALLOWED

Figure 5. Bit Transfer

START

CONDITION

SCL

1

2

SDA

Figure 6. Acknowledge

CLOCK PULSE FOR

ACKNOWLEDGMENT

8

9

NOT ACKNOWLEDGE

ACKNOWLEDGE

COMMAND BYTE IS STORED ON

RECEIPT OF STOP CONDITION

ACKNOWLEDGE FROM

MAX5432–MAX5435

D15 D14 D13 D12 D11 D10 D9 D8

S

SLAVE

ADDRESS

0

A

COMMAND BYTE

AP

NOP/W

ACKNOWLEDGE FROM

MAX5432–MAX5435

Figure 7. Command Byte Received

HOW COMMAND BYTE AND DATA BYTE MAP

INTO MAX5432–MAX5435's REGISTERS

ACKNOWLEDGE FROM

MAX5432–MAX5435

ACKNOWLEDGE FROM

MAX5432–MAX5435

D15 D14 D13 D12 D11 D10 D9 D8

ACKNOWLEDGE FROM

MAX5432–MAX5435

D7 D6 D5 D4 D3 X X X

S

SLAVE ADDRESS

0A

COMMAND BYTE

A

DATA BYTE

AP

1

NOP/W

BYTE

Figure 8. Command and Single Data Byte Received

Nonvolatile Memory

The internal EEPROM consists of a 5-bit nonvolatile

register that retains the value written to it before the

device is powered down. The nonvolatile register is

programmed with the zeros at the factory. Wait a mini-

mum of 12ms after writing to NVREG before sending

another command.

Power-Up

Upon power-up, the MAX5432–MAX5435 load the data

stored in the nonvolatile memory register into the

volatile memory register, updating the wiper position

with the data stored in the nonvolatile memory register.

This initialization period takes 20µs.

Standby

The MAX5432–MAX5435 feature a low-power standby

mode. When the device is not being programmed, it

goes into standby mode and current consumption is

typically 0.5µA.

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