TMS570LS1114 datasheet(120/169 Pages) TI1

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TMS570LS1114

SPNS188B – OCTOBER 2012 – REVISED FEBRUARY 2015

www.ti.com

7.4.1

Features

•

12-bit resolution

•

ADREFHI and ADREFLO pins (high and low reference voltages)

•

Total Sample/Hold/Convert time: 600ns Minimum at 30MHz ADCLK

•

One memory region per conversion group is available (event, group 1, group 2)

•

Allocation of channels to conversion groups is completely programmable

•

Supports flexible channel conversion order

•

Memory regions are serviced either by interrupt or by DMA

•

Programmable interrupt threshold counter is available for each group

•

Programmable magnitude threshold interrupt for each group for any one channel

•

Option to read either 8-bit, 10-bit or 12-bit values from memory regions

•

Single or continuous conversion modes

•

Embedded self-test

•

Embedded calibration logic

•

Enhanced power-down mode

–

Optional feature to automatically power down ADC core when no conversion is in progress

•

External event pin (ADxEVT) programmable as general-purpose I/O

7.4.2

Event Trigger Options

The ADC module supports 3 conversion groups: Event Group, Group1 and Group2. Each of these 3

groups can be configured to be hardware event-triggered. In that case, the application can select from

among 8 event sources to be the trigger for a group's conversions.

7.4.2.1

MIBADC1 Event Trigger Hookup

Table 7-16. MIBADC1 Event Trigger Hookup

Trigger Event Signal

Group Source

Select, G1SRC,

PINMMR30[0] = 0 and PINMMR30[1] = 1

Event #

PINMMR30[0] = 1

G2SRC or

Control for

(default)

Option A

Option B

EVSRC

Option A

Option B

000

AD1EVT

—

AD1EVT

—

PINMMR30[8] = 0

001

N2HET1[8]

N2HET2[5]

PINMMR30[8] = 1

ePWM_B

and

PINMMR30[9] = 1

010

N2HET1[10]

N2HET1[27]

—

N2HET1[27]

—

PINMMR30[16] =

RTI Compare 0

PINMMR30[16] =

0 and

011

ePWM_A1

Interrupt

PINMMR30[17] =

100

N2HET1[12]

N2HET1[17]

—

N2HET1[17]

—

PINMMR30[24] =

0 and

101

N2HET1[14]

N2HET1[19]

N2HET2[1]

PINMMR30[25] =

PINMMR31[0] = 0

110

GIOB[0]

N2HET1[11]

PINMMR31[0] = 1

ePWM_A2

and

PINMMR31[1] = 1

PINMMR31[8] = 0

PINMMR32[16] =

111

GIOB[1]

N2HET2[13]

ePWM_AB

and

PINMMR31[9] = 1

120

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