Hardware References - Texas Instruments Piccolo F280049 controlCARD User Manual

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User manual (13 pages)

Table of Contents

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Connectors

J1:A

Jumpers

LEDs

D2:A

D3:A

D4:A

Resistors and Capacitors (default setting in BOLD)

R18, R19, R21, R22

C19, C20, C21

R24, C28

R36-R47,R49,R53, R60-R64, C41-C47,

and C48-C59

C34-C40

R55-R59

R48,R50-R52,R54

Switches (default position in BOLD)

(Installed with 180 degree rotation)

SPRUIC4C – July 2017 – Revised January 2019

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Table 3. Hardware References

Emulation/UART connector - USB mini A connector used to provide XDS100v2 emulation and

USB-to-UART(SCI) communication through FTDI logic. S1:A determines which connections are

enabled to the MCU.

FSI Connector - Gives an ability to connect FSI signals from the F280049 to another board.

Turns on when the controlCARD is powered ON (green)

Controlled by GPIO-31 with negative logic (red)

Controlled by GPIO-34 with negative logic (red)

Turns on when ISO JTAG logic is powered on (green)

JTAG/UART RX toggle indicator (blue)

JTAG/UART TX toggle indicator (blue)

GPIO22/23 configuration resistors

These resistors allow the user to choose whether GPIO22/23 is used as GPIO (and go to the

baseboard) or whether they will be used in conjunction with the F280049 MCU's internal DC/DC

capability:

• R18,R19 populated with 0-Ω resistors and R21,R22 unpopulated – GPIO22 and

GPIO23 are used as GPIO and go to the baseboard through EC1. The internal DC/DC

cannot be used.

• R18,R19 unpopulated and R21,R22 populated with 0-Ω resistors – Internal DC/DC can be

used to generate the 1.2-V VDD power rail. GPIO22 and GPIO23 are used as VFBSW and

VSW, respectively. The internal DC/DC can be used.

These capacitors should be populated when the F280049's internal DC/DC capability is used.

C19 should be populated with a 2.2-µF capacitor. C20 and C21 should each be populated with a

10-µF capacitor.

R24 and C28 create an optional snubber circuit, which can be used if the DC/DC is used.

Optional RC input filter for all ADC/PGA inputs

PGA filter capacitor when PGA filtering is used

PGA-GND configuration resistors

These resistors control whether the negative input (PGAGND) for each PGA are grounded locally

or whether they should be grounded through pins on the HSEC connector (for use in Kelvin

grounding).

By default, resistors R55-R59 are not populated and R48, R50-R52, R54 are populated.

Because of this, all the PGAs are, by default, expected to be referenced to ground by the

baseboard. If, for example, R55 was populated and R48 was unpopulated, then PGA1's

PGAGND would be grounded on the controlCARD.

Boot Mode Selection Switch

See

Table 4

for a list of selectable boot modes. See the device

information about device boot behavior.

Left (Switch 2) – GPIO24 Configuration Switch:

• In the up position – GPIO24 is pulled high

• In the down position – GPIO24 is pulled low

Right (Switch 1) – GPIO32 Configuration Switch:

• In the up position – GPIO32 is pulled high

• In the down position – GPIO32 is pulled low

GPIO10/GPIO35 Configuration Switches

• In the up position – GPIO10 goes to pin 60 of the HSEC connector. If S4's switch 1 is in the

up position, GPIO35 goes to pin 85 of the HSEC connector.

• In the down position – GPIO10 goes to pin 85 of the HSEC connector. If S4's switch 1 is

in the up position, GPIO35 goes to pin 60 of the HSEC connector.

datasheet

Piccolo F280049 controlCARD Information Guide