mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 103

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3
S12G Memory Map Controller (S12GMMCV1)
3.1
The S12GMMC module controls the access to all internal memories and peripherals for the CPU12 and
S12SBDM module. It regulates access priorities and determines the address mapping of the on-chip
ressources.
3.1.1
3.1.2
The S12GMMC connects the CPU12’s and the S12SBDM’s bus interfaces to the MCU’s on-chip resources
(memories and peripherals). It arbitrates the bus accesses and determines all of the MCU’s memory maps.
Furthermore, the S12GMMC is responsible for constraining memory accesses on secured devices and for
selecting the MCU’s functional mode.
Freescale Semiconductor
Local Addresses
Global Address
Aligned Bus Access
Misaligned Bus Access
NS
SS
Unimplemented Address Ranges
NVM
IFR
(Item No.)
Rev. No.
01.00
01.01
01.02
Introduction
(Submitted By)
Figure 3-1
Glossary
Overview
20-May 2010
3-Aug 2009
2-Jun 2009
Term
Date
shows a block diagram of the S12GMMC module.
Sections
Affected
MC9S12VR Family Reference Manual, Rev. 2.2
Preliminary - Subject to Change Without Notice
Address within the CPU12’s Local Address Map
Address within the Global Address Map
Bus access to an even address.
Bus access to an odd address.
Normal Single-Chip Mode
Special Single-Chip Mode
Address ranges which are not mapped to any on-chip resource.
Non-volatile Memory; Flash or EEPROM
NVM Information Row. Refer to FTMRG Block Guide
Table 3-1. Revision History Table
Table 3-2. Glossary Of Terms
Changed the RAM size of the S12GN32 from 1K to 2K
Changed the RAM size of the S12GN16 from 0.5K to 1K
Updates for S12VR48 and S12VR64
Substantial Change(s)
Definition
(Figure
3-11)
(Figure
3-11)
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