TMS320F28027 datasheet(72/147 Pages) TI2

72 / 147 page

PF0(CPU)

PF2(CPU)

SYSCLKOUT

ADCENCLK

AIO

MUX

ADC

Channels

ADC

Core

12-Bit

0-Wait

Result

Registers

ADCINT1

ADCINT9

ADCTRIG1

TINT0

PIE

CPUTIMER0

ADCTRIG2

TINT1

CPUTIMER1

ADCTRIG3

TINT2

CPUTIMER2

ADCTRIG4

XINT2SOC

XINT2

ADCTRIG5

SOCA 1

ePWM1

ADCTRIG6

SOCB1

ADCTRIG7

SOCA 2

ePWM2

ADCTRIG8

SOCB2

ADCTRIG9

SOCA 3

ePWM3

ADCTRIG10

SOCB3

ADCTRIG11

SOCA 4

ePWM4

ADCTRIG12

SOCB4

Figure 9-17. ADC Connections

ADC Connections if the ADC is Not Used

TI recommends keeping the connections for the analog power pins, even if the ADC is not used. Following is a

summary of how the ADC pins should be connected, if the ADC is not used in an application:

• VDDA – Connect to VDDIO

• VSSA – Connect to VSS

• VREFLO – Connect to VSS

• ADCINAn, ADCINBn, VREFHI – Connect to VSSA

When the ADC module is used in an application, unused ADC input pins should be connected to analog ground

(VSSA).

Note

Unused ADCIN pins that are multiplexed with AIO function should not be directly connected to analog

ground. They should be grounded through a 1-kΩ resistor. This is to prevent an errant code from

configuring these pins as AIO outputs and driving grounded pins to a logic-high state.

When the ADC is not used, be sure that the clock to the ADC module is not turned on to realize power savings.

TMS320F28027, TMS320F28027-Q1, TMS320F28027F, TMS320F28027F-Q1, TMS320F28026

TMS320F28026-Q1, TMS320F28026F, TMS320F28026F-Q1, TMS320F28023

TMS320F28023-Q1, TMS320F28022, TMS320F28021, TMS320F28020, TMS320F280200

SPRS523P – NOVEMBER 2008 – REVISED FEBRUARY 2021

www.ti.com

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Product Folder Links: TMS320F28027 TMS320F28027-Q1 TMS320F28027F TMS320F28027F-Q1

TMS320F28026 TMS320F28026-Q1 TMS320F28026F TMS320F28026F-Q1 TMS320F28023 TMS320F28023-

Q1 TMS320F28022 TMS320F28021 TMS320F28020 TMS320F280200

TMS320F28027 Datasheet(PDF) 72 Page - Texas Instruments

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