DAC3151 datasheet(39/57 Pages) TI

39 / 57 page

DAC3151

DAC3161

DAC3171

www.ti.com

SLAS959A – AUGUST 2013 – REVISED AUGUST 2013

Addr

Default

Bit

Name

Function

Name

(Hex)

Value

config1

0x01

iotest_ena

Turns on the io-testing circuitry when asserted. This is the circuitry

that will compare a 8 sample input pattern to SIF programmed

registers to make sure the data coming into the chip meets

setup/hold requirements. If this bit is a ‘0’ then the clock to this

circuitry is turned off for power savings. NOTE: Sample 0 should

be aligned with the rising edge of SYNC.

reserved

fullwordinterface_ena

When asserted the input interface is changed to use the full 14-bits

for each word, instead of dual 8-bit buses for two half words. Note:

fixed to "1" for DAC3151/DAC3161.

64cnt_ena

This enables the resetting of the alarms after 64 good samples with 0

the goal of removing unnecessary errors. For instance on a lab

board, when checking the setup/hold through IO TEST, there may

initially be errors, but once the test is up and running everything

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

alarm register.

dacclkgone_ena

This allows the DACCLK gone signal from the clock monitor to be

used to shut the output off.

dataclkgone_ena

This allows the DATACLK gone signal from the clock monitor to be

used to shut the output off.

collision_ena

This allows the collision alarm from the FIFO to shut the output off

reserved

reserved.

daca_compliment

When asserted the output to the DACA is complimented. This

allows the user of the chip to effectively change the + and –

designations of the DAC output pins.

reserved

sif_sync

This is the SIF_SYNC signal. Whatever is programmed into this

bitwill be used as the chip sync when SIF_SYNC mode is

enabled.Design is sensitive to rising edges so programming from 0-

>1 is when the sync pulse is generated. 1->0 has no effect.

sif_sync_ena

When asserted enable SIF_SYNC mode.

alarm_2away_ena

When asserted alarms from the FIFO that represent the pointers

being 2 away are enabled

alarm_1away_ena

When asserted alarms from the FIFO that represent the pointers

being 1 away are enabled

alarm_collision_ena

When asserted the collision of FIFO pointers causes an alarm to be 1

generated

reserved

Addr

Bit

Name

Function

Default Value

Name

(Hex)

config2

0x02

reserved

reserved.

reserved

reserved.

13:0

lvdsdata_ena

These 14 bits are individual enables for the 14 input pin receivers.

0x3FFF

Note: for DAC3171 7-bit input interface mode, it is

recommended to turn off bits(6:0).

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