TPS2480PW datasheet(44/60 Pages) TI2

44 / 60 page

TPS2480

TPS2481

SLUS939B – APRIL 2010 – REVISED DECEMBER 2010

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The TPS2480/81 uses a bank of registers for holding configuration settings, measurement results,

maximum/minimum limits, and status information. Table 4 summarizes the TPS2480/81 registers; illustrates

registers.

between completion of a write to a given register and a subsequent read of that register (without changing the

pointer) when using SCL frequencies in excess of 1 MHz.

Table 4. Summary of Register Set

POINTER

POWER-ON RESET

ADDRESS

FUNCTION

TYPE(1)

HEX

BINARY

HEX

All-register reset, settings for bus

Configuration Register

voltage range, PGA Gain, ADC

00111001 10011111

399F

R/W

resolution/averaging.

Shunt Voltage

Shunt voltage measurement data.

Shunt voltage

—

Bus Voltage

Bus voltage measurement data.

Bus voltage

—

Power(2)

Power measurement data.

00000000 00000000

0000

Contains the value of the current flowing

Current(2)

00000000 00000000

0000

through the shunt resistor.

Sets full-scale range and LSB of current

Calibration

and power measurements. Overall

00000000 00000000

0000

R/W

system calibration.

(1)

Type: R = Read-Only, R/W = Read/Write.

(2)

The Power Register and Current Register default to '0' because the Calibration Register defaults to '0', yielding a zero current value until

the Calibration Register is programmed.

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