PXD20RM Datasheet, PDF (926/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

26.5 Memory map and register description
26.5.1 Module memory map
Table 26-1 shows the INTC memory map.
Table 26-1. INTC memory map
Offset from
INTC_BASE_
ADDR¹
Register
Access
Reset
Value
Location
0x0000 INTC_MCR—INTC module configuration register
R/W 0x0000_0000 on page 26-5
0x0004 Reserved
—
—
—
0x0008 INTC_CPR—INTC current priority register
R/W 0x0000_000F on page 26-5
0x00C
0x0010
Reserved
INTC_IACKR—INTC interrupt acknowledge register
R²/W 0x0000_0000 on page 26-7
0x0014 Reserved
0x0018 INTC_EOIR—INTC end of interrupt register
W
0x0000_0000 on page 26-7
0x001C Reserved
0x0020–
0x0027
INTC_SSCIR[0:7]—INTC software set/clear interrupt register
[0:7]
R/W 0x0000_0000 on page 26-8
0x0028–
0x003C
Reserved
—
—
—
0x0040–
0x012C
INTC_PSRn -INTC priority select register [0:238]³
R/W 0x0000_0000 on page 26-9
1 _{INTC_BASE_ADDR = 0xFFF4_8000}
2 _{When the HVEN bit in the INTC module configuration register (INTC_MCR) is asserted, a read of the INTC_IACKR has no}
side effects.
3 _{The PRI fields are “reserved” for peripheral interrupt requests whose vectors are labeled as Reserved in Figure 26-3}
26.5.2 Register description
With exception of the INTC_SSCIn and INTC_PSRn, all registers are 32 bits in width. Any combination
of accessing the four bytes of a register with a single access is supported, provided that the access does not
cross a register boundary. These supported accesses include types and sizes of eight bits, aligned 16 bits,
misaligned 16 bits to the middle two bytes, and aligned 32 bits.
Although INTC_SSCIn and INTC_PSRn are 8 bits wide, they can be accessed with a single 16-bit or
32-bit access, provided that the access does not cross a 32-bit boundary.
In software vector mode, the side effects of a read of INTC_IACKR arethe same regardless of the size of
the read. In either software or hardware vector mode, the size of a write to either
INTC_SSCIR0_3–INTC_SSCIR4_7 or INTC_EOIR does not affect the operation of the write.
26-4
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor