FIFO_RST (0x0A)

FIFO_RST (FIFO Reset) is a write-only register/command that begins a new BIOZ recording by resetting the FIFO

memory and resuming the record with the next available BIOZ data. Execution occurs only if DIN[23:0] = 0x000000.

Unlike the SYNCH command, the operations of any active BIOZ circuitry are not impacted by FIFO_RST, so no settling/

recovery transients apply. FIFO_RST can also be used to quickly recover from a FIFO overflow state.

INFO (0x0F)

INFO is a read-only register that provides information about the MAX30002. The first nibble contains an alternating bit pattern

to aide in interface verification. The second nibble contains the revision ID. The third nibble includes part ID information.

Note: Due to internal initialization procedures, this command will not read-back valid data if it is the first com-

mand executed following either a power-cycle event, or a SW_RST event.

CNFG_GEN (0x10)

CNFG_GEN is a read/write register which governs general settings, most significantly the master clock rate for all internal

timing operations. Anytime a change to CNFG_GEN is made, there may be discontinuities in the BIOZ record and pos-

sibly changes to the size of the time steps recorded in the FIFOs. The SYNCH command can be used to restore internal

synchronization resulting from configuration changes. Note when EN_BIOZ is logic-low, the device is in one of two ultra-

low power modes (determined by EN_ULP_LON).

Table 15. FIFO_RST (0x0A) Register Map

Table 16. INFO (0x0F) Register Map

Table 17. INFO (0x0F) Register Meaning

Table 18. CNFG_GEN (0x10) Register Map

REG

NAME

R/W

23/15/7

22/14/6

21/13/5

20/12/4

19/11/3

18/10/2

17/9/1

16/8/0

0x0A

FIFO_RST

R/W

D[23:16] = 0x00

D[15:8] = 0x00

D[7:0] = 0x00

REG

NAME

R/W

23/15/7

22/14/6

21/13/5

20/12/4

19/11/3

18/10/2

17/9/1

16/8/0

0x0F

INFO

R

0

1

0

1

REV_ID[3:0]

x

x

1

0

x

x

x

x

x

x

x

x

x

x

x

x

INDEX

NAME

MEANING

D[19:16]

REV_ID[3:0]

Revision ID

REG

NAME

R/W

23/15/7

22/14/6

21/13/5

20/12/4

19/11/3

18/10/2

17/9/1

16/8/0

0x10

CNFG_

GEN

R/W

EN_ULP_LON[1:0]

FMSTR[1:0]

x

EN_BIOZ

x

x

EN_BLOFF[1:0]

EN_DCLOFF[1:0]

IPOL

IMAG[2:0]

VTH[1:0]

EN_RBIAS[1:0]

RBIASV[1:0]

RBIASP

RBIASN

MAX30002

Ultra-Low-Power, Single-Channel Integrated

Bioimpedance (BioZ) AFE

www.maximintegrated.com

Maxim Integrated │ 29