TM4C1294NCZAD Datasheet, PDF (537/1914 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C1294NCZAD Microcontroller
7.1
Block Diagram
Figure 7-1. Hibernation Module Block Diagram
Alternate Clock Clock Source for
for LPC
System Clock
To GPIO Module
HIBCTL.CLK32EN
& HIBCTL.OSCSEL
Low
Frequency
Oscillator
HIBCC.
ALTCLK1EN
HIBCC.
SYSCLKEN
I/O Config.
HIBIO
XOSC0
XOSC1
WAKE
VBAT
32.786 kHz
Oscillator
HIBCTL.CLK32EN &
HIBCTL.OSCSEL
Battery-Backed
Memory
16 words
HIBDATA
Pre-Divider
HIBRTCT
RTC
HIBRTCC
HIBRTCLD
HIBRTCM0
HIBRTCSS
HIBCTL.RTCEN
Interrupts
HIBIM
HIBRIS
HIBMIS
HIBIC
MATCH
LOWBAT
Low Battery
Detect
Power
Sequence
Logic
HIBCTL.VBATSEL
HIBCTL.BATCHK
HIBCTL.RTCWEN
HIBCTL.PINWEN
HIBCTL.VABORT
HIBCTL.HIBREQ
HIBCTL.BATWKEN
Interrupts
to CPU
RTCCLK
HIB
Note: References to alternate clock to LPC only apply to devices which have LPC.
7.2 Signal Description
The following table lists the external signals of the Hibernation module and describes the function
of each.
The RTCCLK and TMPR[3:0] signals are alternate functions for a GPIO signal and defaults to be
a GPIO signal at reset. The column in the table below titled "Pin Mux/Pin Assignment" lists the GPIO
pin placement for the RTCCLK and TMPR[3:0] signals. The number in parentheses is the encoding
that must be programmed into the PMCn field in the GPIO Port Control (GPIOPCTL) register
(page 794) to assign each signal to its specified GPIO port pin. In addition, the AFSEL bit in the GPIO
Alternate Function Select (GPIOAFSEL) register (page 777) should be set to choose the proper
HIB function. For more information on configuring GPIOs, see “General-Purpose Input/Outputs
(GPIOs)” on page 746.
The remaining signals have a fixed pin assignment and function.
June 18, 2014
537
Texas Instruments-Production Data