DAC3282 datasheet(24/53 Pages) TI

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EXTIO

coarse_daca/b+1

Rbias

DAC3282

SLAS646A – DECEMBER 2009 – REVISED FEBRUARY 2010

www.ti.com

Default

Address

Bit

Name

Function

Name

Value

CONFIG1

0x00

64cnt_ena

This enables resetting the alarms after 64 good samples with the goal

of removing unnecessary errors. For instance, when checking

setup/hold through the pattern checker test, there may initially be

errors. Setting this bit removes the need for a SIF write to clear the

alarm register.

Unused

Reserved for factory use.

Unused

Reserved for factory use.

When the FIFO is reset, this is the value loaded into the FIFO read

pointer. With this value the initial difference between write and read

4:2

fifo_offset(2:0)

100

pointers can be controlled. This may be helpful in controlling the delay

through the device.

When asserted alarms from the FIFO that represent the write and read

alarm_2away_ena

pointers being 2 away are enabled.

When asserted alarms from the FIFO that represent the write and read

alarm_1away_ena

pointers being 1 away are enabled.

Default

Address

Bit

Name

Function

Name

Value

CONFIG4

0x04

7:4

coarse_daca(3:0)

Scales the output current in 16 equal steps.

1111

3:0

coarse_dacb(3:0)

Scales the output current in 16 equal steps.

1111

Default

Address

Bit

Name

Function

Name

Value

CONFIG5

0x05

7:0

tempdata(7:0)

This is the output from the chip temperature sensor. The value of this

N/A

degrees Celsius. This register must be read with a minimum SCLK

period of 1ms. (Read Only)

Default

Address

Bit

Name

Function

Name

Value

CONFIG6

0x06

Unused

Reserved for factory use.

6:0

alarm_mask(6:0)

These bits control the masking of the alarm outputs. This means that the

0000000

ALARM_SDO pin will not be asserted if the appropriate bit is set. The

alarm will still show up in the CONFIG7 bits. (0=not masked, 1=

masked).

alarm_mask

Masked Alarm

alarm_from_zerochk

alarm_fifo_collision

reserved

alarm_from_iotest

not used (expansion)

alarm_fifo_2away

alarm_fifo_1away

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