S912XEP100J5MAGR Freescale Semiconductor, S912XEP100J5MAGR Datasheet - Page 220

• Manufacturer Part Number: S912XEP100J5MAGR
• Description: S912XEP Series 16 Bit 50 Mhz 1 MB Flash 64 KB Ram Microcontroller - LQFP-144
• Manufacturer: Freescale Semiconductor

Chapter 3 Memory Mapping Control (S12XMMCV4)
3.4.2.5.1
System XSRAM has two ways to be accessed by the CPU. One is by the programming of RPAGE and the
fixed XSRAM areas configured by the values of ROMHM, RAMHM, or by the usage of the global
instruction and the usage of GPAGE.
Figure 3-22
is done by the device definition and denoted by RAMSIZE.
220
0x3F_FFFF
0x00_0000
0x00_07FF
0x0F_FFFF
0x13_FFFF
0x7F_FFFF
Because of an order from the United States International Trade Commission, BGA-packaged product lines and partnumbers
indicated here currently are not available from Freescale for import or sale in the United States prior to September 2010
RAM Area in the Memory Map
EEPROM Area
FLASH Area
Space Area
REG. Area
RAM Area
shows the memory map for the implemented XSRAM. The size of the implemented XSRAM
External
System XSRAM
Figure 3-22. S12XE System RAM in the Memory Map
MC9S12XE-Family Reference Manual , Rev. 1.23
0x0F_E000
0x0F_FFFF
0x00_0800
ROMHM = 1 RAMHM = 0
ROMHM = 0 RAMHM = X
Unimplemented
8K RAM
RAM
0x0F_A000
0x00_0800
0x0F_C000
0x0F_FFFF
ROMHM = 1 RAMHM = 1
Unimplemented
Freescale Semiconductor
16K RAM
8K RAM
RAM