Datasheet

ADS1281

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SBAS378D –AUGUST 2007–REVISED JUNE 2010

The Register mode (PINMODE = 0) allows read and write access to the device registers. Collectively, the

registers contain all the information needed to configure the device, such as data rate, filter selection, calibration,

etc. The registers are accessed by the RREG and WREG commands. The registers can be accessed individually

or as a block of registers by sending or receiving consecutive bytes. Note that after a register write operation, the

ADC resets, resulting in 63 reading interruption.

Table 23. Register Map

RESET

ADDRESS REGISTER VALUE BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

00h ID X0h ID3 ID2 ID1 ID0 0 0 0 0

01h CONFIG0 52h SYNC 1 DR2 DR1 DR0 PHS FILTR1 FILTR0

02h Reserved 08h 0 0 0 0 1 0 0 0

03h HPF0 32h HPF07 HPF06 HPF05 HPF04 HPF03 HPF02 HPF01 HPF00

04h HPF1 03h HPF15 HPF14 HPF13 HPF12 HPF11 HPF10 HPF09 HPF08

05h OFC0 00h OFC07 OFC06 OFC05 OFC04 OFC03 OFC02 OFC01 OFC00

06h OFC1 00h OFC15 OFC14 OFC13 OFC12 OFC11 OFC10 OFC09 OFC08

07h OFC2 00h OFC23 OFC22 OFC21 OFC20 OFC19 OFC18 OFC17 OFC16

08h FSC0 00h FSC07 FSC06 FSC05 FSC04 FSC03 FSC02 FSC01 FSC00

09h FSC1 00h FSC15 FSC14 FSC13 FSC12 FSC11 FSC10 FSC09 FSC08

0Ah FSC2 40h FSC23 FSC22 FSC21 FSC20 FSC19 FSC18 FSC17 FSC16

ID: ID REGISTER (ADDRESS 00h)

7 6 5 4 3 2 1 0

ID3 ID2 ID1 ID0 0 0 0 0

Reset value = X8h.

Bits[7:4] ID[3:0]

Factory-programmed identification bits (read-only)

Bits[3:0] Reserved

Always write '0'

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