ADA8282 datasheet(22/27 Pages) AD

22 / 27 page

AD8283

Data Sheet

Rev. C | Page 22 of 27

Table 9. AD8283 Memory Map Register

Addr.

(Hex)

Bit 7

(MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

(LSB)

Default

Value

Default Notes/

Comments

Chip Configuration Registers

CHIP_PORT_CONFIG

LSB first

1 = on

0 = off

(default)

Soft

reset

1 = on

0 = off

(default)

Soft

reset

1 = on

0 = off

(default)

LSB first

1 = on

0 = off

(default)

0x18

The nibbles

should be

mirrored so

that LSB- or

MSB-first mode

is set correct

regardless of

shift mode.

CHIP_ID

Chip ID Bits[7:0]

(AD8283 = 0xA2, default)

Read

only

The default is a

unique chip ID,

specific to the

AD8283. This is

a read-only

Device Index and Transfer Registers

DEVICE_INDEX_2

Data

Channel

1 = on

(default)

0 = off

Data

Channel

1 = on

(default)

0 = off

0x0F

Bits are set to

determine

which on-chip

device receives

the next write

command.

DEVICE_INDEX_1

Data

Channel

1 = on

(default)

0 = off

Data

Channel

1 = on

(default)

0 = off

Data

Channel

1 = on

(default)

0 = off

Data

Channel

1 = on

(default)

0 = off

0x0F

Bits are set to

determine

which on-chip

device receives

the next write

command.

DEVICE_UPDATE

transfer

1 = on

0 = off

(default)

0x00

Synchronously

transfers data

from the

master shift

slave.

Channel Functions Registers

GLOBAL_MODES

Internal power-

down mode

00 = chip run

(default)

01 = full power-

down

11 = reset

0x00

Determines the

power-down

mode (global).

GLOBAL_CLOCK

Duty

cycle

stabilizer

1 = on

(default)

0 = off

0x01

Turns the

internal duty

cycle stabilizer

on and off

(global).

FLEX_MUX_CONTROL

Power-

down of

unused

channels

0 = PD

(power-

down;

default)

1 =

power-on

Mux input active channels

0000 = A

0001 =

Aux

0010 = AB

0011 = A

Aux

0100 = ABC

0101 = AB

Aux

0110 = ABCD

0111 = ABC

Aux

1000 = ABCDE

1001 = ABCD

Aux

1010 = ABCDEF

1011 = ABCDE Aux

0x00

Sets which mux

input channel(s)

are in use and

whether to

power down

unused

channels.

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