Datasheet

TPS2480
TPS2481
SLUS939B –APRIL 2010–REVISED DECEMBER 2010 www.ti.com
REGISTER INFORMATION
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.
Register contents are updated 4 ms after completion of the write command. Therefore, a 4-ms delay is required
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
REGISTER NAME FUNCTION TYPE
(1)
HEX BINARY HEX
All-register reset, settings for bus
00 Configuration Register voltage range, PGA Gain, ADC 00111001 10011111 399F R/W
resolution/averaging.
01 Shunt Voltage Shunt voltage measurement data. Shunt voltage — R
02 Bus Voltage Bus voltage measurement data. Bus voltage — R
03 Power
(2)
Power measurement data. 00000000 00000000 0000 R
Contains the value of the current flowing
04 Current
(2)
00000000 00000000 0000 R
through the shunt resistor.
Sets full-scale range and LSB of current
05 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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