MC3S12RG128 Datasheet, PDF (117/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

3.3.1.2
Chapter 3 Module Mapping Control (MMCV5) Block Description
Initialization of Internal Registers Position Register (INITRG)
Module Base + 0x0011
Starting address location affected by INITRG register setting.
7
6
5
4
3
2
1
0
R
0
0
0
0
REG14
REG13
REG12
REG11
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 3-4. Initialization of Internal Registers Position Register (INITRG)
Read: Anytime
Write: Once in normal and emulation modes and anytime in special modes
This register initializes the position of the internal registers within the on-chip system memory map. The
registers occupy either a 1K byte or 2K byte space and can be mapped to any 2K byte space within the first
32K bytes of the system’s address space.
Table 3-2. INITRG Field Descriptions
Field
Description
6:3
Internal Register Map Position — These four bits in combination with the leading zero supplied by bit 7 of
REG[14:11] INITRG determine the upper five bits of the base address for the system’s internal registers (i.e., the minimum
base address is 0x0000 and the maximum is 0x7FFF).
MC3S12RG128 Data Sheet, Rev. 1.05
Freescale Semiconductor
117