Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 220 / 352

System Control
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SYSCTLTABLE
is an array of pointers located at
ROM_APITABLE[13]
.
ROM_SysCtlSleep
is a function pointer located at
ROM_SYSCTLTABLE[0]
.
Description:
This function places the processor into sleep mode; it will not return until the processor re-
turns to run mode. The peripherals that are enabled via
ROM_SysCtlPeripheralSleepEnable()
continue to operate and can wake up the processor (if automatic clock gating is enabled with
ROM_SysCtlPeripheralClockGating() , otherwise all peripherals continue to operate).
Returns:
None.
18.2.1.33 ROM_SysCtlSRAMSizeGet
Gets the size of the SRAM.
Prototype:
uint32_t
ROM_SysCtlSRAMSizeGet(void)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SYSCTLTABLE
is an array of pointers located at
ROM_APITABLE[13]
.
ROM_SysCtlSRAMSizeGet
is a function pointer located at
ROM_SYSCTLTABLE[1]
.
Description:
This function determines the size of the SRAM.
Returns:
The total number of bytes of SRAM.
18.2.1.34 ROM_SysCtlUSBPLLDisable
Powers down the USB PLL.
Prototype:
void
ROM_SysCtlUSBPLLDisable(void)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SYSCTLTABLE
is an array of pointers located at
ROM_APITABLE[13]
.
ROM_SysCtlUSBPLLDisable
is a function pointer located at
ROM_SYSCTLTABLE[32]
.
Description:
This function will disable the USB controller’s PLL which is used by it’s physical layer. The USB
registers are still accessible, but the physical layer will no longer function.
Returns:
None.
220 April 8, 2013