MAX17843 datasheet(111/131 Pages) MAXIM

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BIT

POR

NAME

DESCRIPTION

D15

SCANDONE

Indicates the acquisition has completed. Cleared only by writing it to logic-zero to detect

completion of the next acquisition. Writing to logic 1 has no effect. A new acquisition will not

commence if this bit is set.

D14

SCANTIMEOUT

Indicates the acquisition did not complete in the expected period of time. The timeout

depends on the oversampling configuration. Cleared only by writing it to logic-zero to allow

detection of future timeout events. The watchdog can be disabled by setting SCANTODIS

in the DEVCFG register.

D13

DATARDY

Indicates the measurement data from the acquisition has been transferred from the ALU to

the data registers and can now be read. Data for all measurement registers and MIN/MAX/

TOTAL is transferred at the same time. Cleared by writing it to logic-zero to allow detection

of the next data transfer. Writing to logic-one has no effect.

D12

DELAYSEL

The delay after the start of the scan before the measurement is enabled only if

the AUTOBALSWDIS bit is set to 1. Sets the delay based on the setting in the

AUTOBALSWDIS Delay register (0x0C). The default bit setting is 0 which selects the delay

associated with cell recovery time in register 0x0C. Setting this bit to 1 selects the delay

setting of “Diagnostic Recovery time.” See AUTOBALSWDIS Delay Register (address

0x0C) table for details on delay timings.

D11

AUTOBALSWDIS

Automatic disable of balancing switches during measurements. The delay for cell recovery

settling time and for the diagnostic recovery is set based on the AUTOBALSWDIS Delay

D10

BALSWDIAG[2:0]

Configures the cell-balancing switch diagnostic modes per table below. When selected,

these modes effectively override the BALSWEN, MEASUREEN, ALTMUXSEL, and

POLARITY configurations during the acquisition mode and update the ALRTBALSW

for details.

BALSWDIAG[2:0]

DIAGNOSTIC TEST

000

None

001

Balancing switch short

010

Balancing switch open

011

None

100

None

101

Cell sense open odds

110

Cell sense open evens

111

None

RDFILT

This bit chooses where the ADC scan data is read from. Writing this bit to ‘1’ enables the

read to occur from filtered CELLn registers. The default value is ‘0’ wherein the read of the

scanned data occurs from unfiltered ALU registers.

MAX17843

12-Channel, High-Voltage Smart Sensor

Data-Acquisition Interface

www.maximintegrated.com

Maxim Integrated │ 111

SCANCTRL Register (address 0x13)

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