PXN20RM Datasheet, PDF (136/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Clocks, Reset, and Power (CRP)
6.1.3 Modes of Operation
There are two functional modes of operation for the CRP: normal operation and sleep mode.
In normal operation, all CRP registers can be read or written. The input isolation, low-power FSM, and
wake-up logic are disabled. The voltage regulator, LVI, and power switch outputs are in the enabled state.
The RTC/API and associated interrupts are optionally enabled.
In sleep mode, the bus interface is disabled and the input isolation is enabled. The RTC/API is enabled if
enabled prior to entry into sleep. See Section 6.4.2, RTC Functional Description, for further details.
6.2 Memory Map and Registers
This section provides a detailed description of all CRP registers.
6.2.1 Module Memory Map
The CRP memory map is shown in Table 6-1. The address of each register is given as an offset to the CRP
base address. Registers are listed in address order, identified by complete name and mnemonic, and lists
the type of accesses allowed.
Table 6-1. CRP Memory Map
Offset from
CRP_BASE
(0xFFFE_C000)
0x0000
0x0004–0x000F
0x0010
0x0014
0x0018
0x001C–0x003F
0x0040
0x0044
0x0048
0x004C
0x0050
0x0054
0x0058
0x005C–0x005F
0x0060
0x0064–0x006F
Register
Access Reset Value Section/Page
CRP_CLKSRC—Clock source register
Reserved
CRP_RTCC—RTC control register
CRP_RTSC—RTC status register
CRP_RTCCNT—RTC counter register
Reserved
CRP_PWKENH—Pin wakeup enable high register
CRP_PWKENL—Pin wakeup enable low register
CRP_PWKSRCIE—Pin wakeup source interrupt enable
register
CRP_PWKSRCF—Pin wakeup source flag register
CRP_Z6VEC—Z6 reset vector register
CRP_Z0VEC—Z0 reset vector register
CRP_RECPTR—Recovery pointer register
Reserved
CRP_PSCR—Power status and control register
Reserved
R/W 0x0001_1F3F 6.2.2.1/6-5
R/W 0x0000_0000
R 0x0000_0000
R 0x0000_0000
6.2.2.2/6-6
6.2.2.3/6-8
6.2.2.4/6-9
R/W 0x0000_0000 6.2.2.5/6-9
R/W 0x0000_0000 6.2.2.5/6-9
R/W 0x0000_0000 6.2.2.6/6-11
R 0x0000_0000 6.2.2.7/6-11
R/W 0xFFFF_0001 6.2.2.8/6-12
R/W 0xFFFF_FFFE 6.2.2.9/6-12
R/W 0xFFFF_FFFC 6.2.2.10/6-13
R/W 0x0000_0000 6.2.2.11/6-14
PXN20 Microcontroller Reference Manual, Rev. 1
6-4
Freescale Semiconductor