Table 24-14. MCG Modes of Operation (continued)
Mode
Description
FLL Bypassed External
(FBE)
FLL bypassed external (FBE) mode is entered when all the following conditions occur:
• C1[CLKS] bits are written to 10
• C1[IREFS] bit is written to 0
• C1[FRDIV] must be written to divide external reference clock to be within the range of 31.25
kHz to 39.0625 kHz.
• C6[PLLS] bit is written to 0
• C2[LP] is written to 0
In FBE mode, the MCGOUTCLK is derived from the OSCSEL external reference clock. The FLL is
operational but its output is not used. This mode is useful to allow the FLL to acquire its target
frequency while the MCGOUTCLK is driven from the external reference clock. The FLL clock
(DCOCLK) is controlled by the external reference clock, and the DCO clock frequency locks to a
multiplication factor, as selected by the C4[DRST_DRS] and C4[DMX32] bits, times the divided
external reference frequency. Refer to the C4[DMX32] bit description for more details. In FBI mode
the PLL is disabled in a low-power state unless C5[PLLCLKEN] is set.
PLL Engaged External
(PEE)
PLL Engaged External (PEE) mode is entered when all the following conditions occur:
• C1[CLKS] bits are written to 00
• C1[IREFS] bit is written to 0
• C6[PLLS] bit is written to 1
In PEE mode, the MCGOUTCLK is derived from the PLL clock, which is controlled by the external
reference clock. The PLL clock frequency locks to a multiplication factor, as specified by C6[VDIV],
times the external reference frequency, as specified by C5[PRDIV]. The PLL's programmable
reference divider must be configured to produce a valid PLL reference clock. The FLL is disabled in
a low-power state.
PLL Bypassed External
(PBE)
PLL Bypassed External (PBE) mode is entered when all the following conditions occur:
• C1[CLKS] bits are written to 10
• C1[IREFS] bit is written to 0
• C6[PLLS] bit is written to 1
• C2[LP] bit is written to 0
In PBE mode, MCGOUTCLK is derived from the OSCSEL external reference clock; the PLL is
operational, but its output clock is not used. This mode is useful to allow the PLL to acquire its
target frequency while MCGOUTCLK is driven from the external reference clock. The PLL clock
frequency locks to a multiplication factor, as specified by its [VDIV], times the PLL reference
frequency, as specified by its [PRDIV]. In preparation for transition to PEE, the PLL's programmable
reference divider must be configured to produce a valid PLL reference clock. The FLL is disabled in
a low-power state.
Table continues on the next page...
Chapter 24 Multipurpose Clock Generator (MCG)
K53 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
565
Содержание K53 Series
Страница 2: ...K53 Sub Family Reference Manual Rev 6 Nov 2011 2 Freescale Semiconductor Inc...
Страница 58: ...K53 Sub Family Reference Manual Rev 6 Nov 2011 58 Freescale Semiconductor Inc...
Страница 70: ...Orderable part numbers K53 Sub Family Reference Manual Rev 6 Nov 2011 70 Freescale Semiconductor Inc...
Страница 168: ...Human machine interfaces HMI K53 Sub Family Reference Manual Rev 6 Nov 2011 168 Freescale Semiconductor Inc...
Страница 206: ...Boot K53 Sub Family Reference Manual Rev 6 Nov 2011 206 Freescale Semiconductor Inc...
Страница 218: ...Security Interactions with other Modules K53 Sub Family Reference Manual Rev 6 Nov 2011 218 Freescale Semiconductor Inc...
Страница 342: ...PMC Memory Map Register Definition K53 Sub Family Reference Manual Rev 6 Nov 2011 342 Freescale Semiconductor Inc...
Страница 362: ...Functional description K53 Sub Family Reference Manual Rev 6 Nov 2011 362 Freescale Semiconductor Inc...
Страница 384: ...Initialization application information K53 Sub Family Reference Manual Rev 6 Nov 2011 384 Freescale Semiconductor Inc...
Страница 406: ...Application Information K53 Sub Family Reference Manual Rev 6 Nov 2011 406 Freescale Semiconductor Inc...
Страница 424: ...Functional Description K53 Sub Family Reference Manual Rev 6 Nov 2011 424 Freescale Semiconductor Inc...
Страница 514: ...Initialization application information K53 Sub Family Reference Manual Rev 6 Nov 2011 514 Freescale Semiconductor Inc...
Страница 524: ...Functional Description K53 Sub Family Reference Manual Rev 6 Nov 2011 524 Freescale Semiconductor Inc...
Страница 546: ...Restrictions on Watchdog Operation K53 Sub Family Reference Manual Rev 6 Nov 2011 546 Freescale Semiconductor Inc...
Страница 594: ...Interrupts K53 Sub Family Reference Manual Rev 6 Nov 2011 594 Freescale Semiconductor Inc...
Страница 628: ...Functional description K53 Sub Family Reference Manual Rev 6 Nov 2011 628 Freescale Semiconductor Inc...
Страница 702: ...Flash Operation in Low Power Modes K53 Sub Family Reference Manual Rev 6 Nov 2011 702 Freescale Semiconductor Inc...
Страница 772: ...Functional description K53 Sub Family Reference Manual Rev 6 Nov 2011 772 Freescale Semiconductor Inc...
Страница 808: ...Initialization Application Information K53 Sub Family Reference Manual Rev 6 Nov 2011 808 Freescale Semiconductor Inc...
Страница 864: ...Application information K53 Sub Family Reference Manual Rev 6 Nov 2011 864 Freescale Semiconductor Inc...
Страница 894: ...DAC Interrupts K53 Sub Family Reference Manual Rev 6 Nov 2011 894 Freescale Semiconductor Inc...
Страница 908: ...Functional Description K53 Sub Family Reference Manual Rev 6 Nov 2011 908 Freescale Semiconductor Inc...
Страница 920: ...Functional Description K53 Sub Family Reference Manual Rev 6 Nov 2011 920 Freescale Semiconductor Inc...
Страница 926: ...Functional Description K53 Sub Family Reference Manual Rev 6 Nov 2011 926 Freescale Semiconductor Inc...
Страница 1092: ...FTM Interrupts K53 Sub Family Reference Manual Rev 6 Nov 2011 1092 Freescale Semiconductor Inc...
Страница 1114: ...Functional description K53 Sub Family Reference Manual Rev 6 Nov 2011 1114 Freescale Semiconductor Inc...
Страница 1156: ...Functional description K53 Sub Family Reference Manual Rev 6 Nov 2011 1156 Freescale Semiconductor Inc...
Страница 1304: ...On The Go Operation K53 Sub Family Reference Manual Rev 6 Nov 2011 1304 Freescale Semiconductor Inc...
Страница 1334: ...USB Voltage Regulator Module Signal Descriptions K53 Sub Family Reference Manual Rev 6 Nov 2011 1334 Freescale Semiconductor Inc...
Страница 1388: ...Initialization Application Information K53 Sub Family Reference Manual Rev 6 Nov 2011 1388 Freescale Semiconductor Inc...
Страница 1514: ...Application information K53 Sub Family Reference Manual Rev 6 Nov 2011 1514 Freescale Semiconductor Inc...
Страница 1622: ...Software restrictions K53 Sub Family Reference Manual Rev 6 Nov 2011 1622 Freescale Semiconductor Inc...
Страница 1694: ...Initialization application information K53 Sub Family Reference Manual Rev 6 Nov 2011 1694 Freescale Semiconductor Inc...
Страница 1704: ...Functional description K53 Sub Family Reference Manual Rev 6 Nov 2011 1704 Freescale Semiconductor Inc...
Страница 1734: ...Application information K53 Sub Family Reference Manual Rev 6 Nov 2011 1734 Freescale Semiconductor Inc...
Страница 1800: ...Application information K53 Sub Family Reference Manual Rev 6 Nov 2011 1800 Freescale Semiconductor Inc...
Страница 1822: ...K53 Sub Family Reference Manual Rev 6 Nov 2011 1822 Freescale Semiconductor Inc...