Texas Instruments EK-TM4C123GXL, Руководство пользователя

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Power Management
Table 2-6. J4 Connector
Analog
Tiva C
GPIOPCTL Register Setting
On-
Function
J4 Series
GPIO board
Pin MCU
GPIO
Function
1 2 3 4 5 6 7 8 9 14 15
Pin
AMSEL
4.01 PF2 – Blue LED 30 – SSI1Clk – M0FAULT0 M1PWM6 – T1CCP0 – – – TRD0
(R11)
4.02 PF3 – Green 31 – SSI1Fss CAN0Tx – M1PWM7 – T1CCP1 – – – TRCLK
LED
(R12)
4.03 PB3 – – 48 – – I2C0SDA – – – T3CCP1 – – – –
4.04 PC4 C1– – 16 U4Rx U1Rx – M0PWM6 – IDX1 WT0CCP0 U1RTS – – –
4.05 PC5 C1+ – 15 U4Tx U1Tx – M0PWM7 – PhA1 WT0CCP1 U1CTS – – –
4.06 PC6 C0+ – 14 U3Rx – – – – PhB1 WT1CCP0 USB0EPE – – –
N
4.07 PC7 C0– – 13 U3Tx – – – – – WT1CCP1 USB0PFLT – – –
4.08 PD6 – – 53 U2Rx – – – – PhA0 WT5CCP0 – – – –
4.09 PD7 – – 10 U2Tx – – – – PhB0 WT5CCP1 NMI – – –
4.10 PF4 – USR_SW 5 – – – – M1FAULT0 IDX0 T2CCP0 USB0EPE – – –
1 (R13) N
Connectors J1 and J2 of the Tiva C Series TM4C123G LaunchPad BoosterPack XL Interface provide
compatibility with MSP430 LaunchPad BoosterPacks. Highlighted functions (shaded cells) in
Table 2-3
through Table 2-5 indicate configuration for compatibility with the MSP430 LaunchPad.
A complete list of Tiva C Series BoosterPacks and Tiva C Series LaunchPad-compatible MSP430
BoosterPacks is available at
www.ti.com/tm4c123g-launchpad .
2.2 Power Management
2.2.1 Power Supplies
The Tiva C Series LaunchPad can be powered from one of two power sources:
• On-board ICDI USB cable (Debug, Default)
• USB device cable (Device)
The POWER SELECT switch (SW3) is used to select one of the two power sources. Select only one
source at a time.
2.2.2 Hibernate
The Tiva C Series LaunchPad provides an external 32.768-kHz crystal (Y1) as the clock source for the
TM4C123GH6PM Hibernation module clock source. The current draw while in Hibernate mode can be
measured by making some minor adjustments to the Tiva C Series LaunchPad. This procedure is
explained in more detail later in this section.
The conditions that can generate a wake signal to the Hibernate module on the Tiva C Series LaunchPad
are waking on a Real-time Clock (RTC) match and/or waking on assertion of the WAKE pin.
(1)
The second
user switch (SW2) is connected to the WAKE pin on the microcontroller. The WAKE pin, as well as the
V
DD
and HIB pins, are easily accessible through breakout pads on the Tiva C Series LaunchPad. See the
appended schematics for details.
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(1)
If the board does not turn on when you connect it to a power source, the microcontroller might be in Hibernate mode (depending on the
programmed application). You must satisfy one of the programmed wake conditions and connect the power to bring the microcontroller
out of Hibernate mode and turn on the board.
11 SPMU296 – April 2013 Hardware Description
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