AD7280ABSTZ datasheet(28/48 Pages) AD

28 / 48 page

AD7280A

Rev. 0 | Page 28 of 48

Table 13.

Address

Data

Read/Write

Cell Voltage 1

0x00

D11 to D0

Read only

Cell Voltage 2

0x01

D11 to D0

Read only

Cell Voltage 3

0x02

D11 to D0

Read only

Cell Voltage 4

0x03

D11 to D0

Read only

Cell Voltage 5

0x04

D11 to D0

Read only

Cell Voltage 6

0x05

D11 to D0

Read only

AUX ADC 1

0x06

D11 to D0

Read only

AUX ADC 2

0x07

D11 to D0

Read only

AUX ADC 3

0x08

D11 to D0

Read only

AUX ADC 4

0x09

D11 to D0

Read only

AUX ADC 5

0x0A

D11 to D0

Read only

AUX ADC 6

0x0B

D11 to D0

Read only

Self-Test

0x0C

D11 to D0

Read only

Control

0x0D

D15 to D8

Read/write

0x0E

D7 to D0

Read/write

Cell Overvoltage

0x0F

D7 to D0

Read/write

Cell Undervoltage

0x10

D7 to D0

Read/write

AUX ADC Overvoltage

0x11

D7 to D0

Read/write

AUX ADC Undervoltage

0x12

D7 to D0

Read/write

Alert

0x13

D7 to D0

Read/write

Cell Balance

0x14

D7 to D0

Read/write

CB1 Timer

0x15

D7 to D0

Read/write

CB2 Timer

0x16

D7 to D0

Read/write

CB3 Timer

0x17

D7 to D0

Read/write

CB4 Timer

0x18

D7 to D0

Read/write

CB5 Timer

0x19

D7 to D0

Read/write

CB6 Timer

0x1A

D7 to D0

Read/write

PD Timer

0x1B

D7 to D0

Read/write

Read

0x1C

D7 to D0

Read/write

CNVST Control

0x1D

D7 to D0

Read/write

CELL VOLTAGE REGISTERS

The cell voltage registers store the conversion result from each cell

input. The conversion result is in 12-bit straight binary format.

AUXILIARY ADC REGISTERS

The AUX ADC registers store the conversion result from each

auxiliary ADC input. The conversion result is in 12-bit straight

binary format.

SELF-TEST REGISTER

The self-test register stores the conversion result of the ADC

self-test. The conversion result is in 12-bit straight binary format.

CONTROL REGISTER

The control register is a 16-bit register that is used to configure

the AD7280A. Table 14 describes the operation of each bit in

the control register.

Table 14. Control Register Settings

Bits

Description

[D15:D14]

Select conversion inputs

00 = six cell voltages and six AUX ADCs (default)

01 = six cell voltages and AUX1, AUX3, and AUX5

10 = six cell voltages only

11 = ADC self-test

[D13:D12]

Read conversion results

00 = six voltages and six AUX ADCs (default)

01 = six voltages and AUX1, AUX3, and AUX5

10 = six cell voltages only

11 = no-read operation

D11

Conversion start format

0 = falling edge of CNVST input (default)

1 = rising edge of CS

[D10:D9]

Conversion averaging

00 = single conversion only (default)

01 = average by 2

10 = average by 4

11 = average by 8

Power-down format

0 = falling edge of PD input (default)

1 = software power-down

Software reset

0 = take the AD7280A out of reset (default)

1 = reset

the AD7280A

[D6:D5]

Set acquisition time

00 = 400 ns (default)

01 = 800 ns

10 = 1.2 μs

11 = 1.6 μs

Reserved; set to 1

Thermistor termination resistor

0 = function not in use (default)

1 = termination resistor connected

Lock device address

0 = does not lock to new device address; continues

to operate with Device Address 0x00 (default)

1 = part locks to new device address that it is

presented with

Increment device address

0 = does not increment the device address when

transferring data up the daisy chain

1 = increments the device address when

transferring data up the daisy chain (default)

Daisy-chain register readback

0 = function not in use; registers are read in single

1 = set daisy chain for register readback (default)

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