MC9S12P128 Datasheet, PDF (115/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

S12P Memory Map Control (S12PMMCV1)
Expansion of the BDM Local Address Map
PPAGE and BDMPPR register is also used for the expansion of the BDM local address to the global
address. These registers can be read and written by the BDM.
The BDM expansion scheme is the same as the CPU expansion scheme.
The four BDMPPR Program Page index bits allow access to the full 256KB address map that can be
accessed with 18 address bits.
The BDM program page index register (BDMPPR) is used only when the feature is enabled in BDM and,
in the case the CPU is executing a firmware command which uses CPU instructions, or by a BDM
hardware commands. See the BDM Block Guide for further details. (see Figure 3-9).
BDM HARDWARE COMMAND
Global Address [17:0]
Bit17
Bit14 Bit13
Bit0
BDMPPR Register [3:0]
BDM Local Address [13:0]
BDM FIRMWARE COMMAND
Global Address [17:0]
Bit17
Bit14 Bit13
Bit0
BDMPPR Register [3:0]
CPU Local Address [13:0]
Figure 3-9. BDMPPR Address Mapping
S12P-Family Reference Manual, Rev. 1.12
Freescale Semiconductor
115