Flash Memory Map
4. Setting EX = 1 is not recommended in the 56F8355/56F8155, since the EMI is not functional in this package.
5. The Data RAM is organized as a 2K x 32-bit memory to allow single-cycle, long-word operations.
4.5 Flash Memory Map
Figure 4-1 illustrates the Flash Memory (FM) map on the system bus.
The Flash Memory is divided into three functional blocks. The Program and boot memories reside on the
Program Memory buses. They are controlled by one set of banked registers. Data Memory Flash resides
on the Data Memory buses and is controlled separately by its own set of banked registers.
The top nine words of the Program Memory Flash are treated as special memory locations. The content of
these words is used to control the operation of the Flash Controller. Because these words are part of the
Flash Memory content, their state is maintained during power-down and reset. During chip initialization,
the content of these memory locations is loaded into Flash Memory control registers, detailed in the Flash
Memory chapter of the 56F8300 Peripheral User Manual. These configuration parameters are located
between $01_FFF7 and $01_FFFF.
Program Memory
Data Memory
FM_BASE + $14
FM_BASE + $00
BOOT_FLASH_START + $1FFF
Banked Registers
16KB
Boot
Unbanked Registers
BOOT_FLASH_START = $02_0000
PROG_FLASH_START + $01_FFFF
PROG_FLASH_START + $01_FFF7
PROG_FLASH_START + $01_FFF6
FM_PROG_MEM_TOP = $01_FFFF
Configure Field
DATA_FLASH_START + $0FFF
DATA_FLASH_START + $0000
128KB
Program
8KB
Note: Data Flash is
NOT available in the
56F8155 device.
BLOCK 1 Odd (2 Bytes) $01_0003
BLOCK 1 Even (2 Bytes) $01_0002
BLOCK 1 Odd (2 Bytes) $01_0001
BLOCK 1 Even (2 Bytes) $01_0000
PROG_FLASH_START + $01_0000
PROG_FLASH_START + $00_FFFF
128KB
Program
BLOCK 0 Odd (2 Bytes) $00_0003
BLOCK 0 Even (2 Bytes) $00_0002
BLOCK 0 Odd (2 Bytes) $00_0001
BLOCK 0 Even (2 Bytes) $00_0000
PROG_FLASH_START = $00_0000
Figure 4-1 Flash Array Memory Maps
Table 4-7 shows the page and sector sizes used within each Flash memory block on the chip.
Note: Data Flash is NOT available on the 56F8155 device.
56F8355 Technical Data, Rev. 12
Freescale Semiconductor
Preliminary
43
FREESCALE [ Freescale ]
