56F8335 datasheet(42/160 Pages) FREESCALE

42 / 160 page

56F8335 Technical Data, Rev. 5

Freescale Semiconductor

Preliminary

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 $00_FFF7 and $00_FFFF.

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 56F8135 device.

Table 4-7. Flash Memory Partitions

Flash Size

Sectors

Sector Size

Page Size

Program Flash

64KB

2K x 16 bits

512 x 16 bits

BOOT_FLASH_START = $02_0000

BOOT_FLASH_START + $1FFF

Block 0 Odd

Block 0 Even

PROG_FLASH_START + $00_FFFF

8KB

Boot

Reserved

Configure Field

PROG_FLASH_START + $00_FFF7

PROG_FLASH_START + $00_FFF6

64KB

PROG_FLASH_START = $00_0000

FM_PROG_MEM_TOP = $00_FFFF

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

FM_BASE + $14

Banked Registers

Unbanked Registers

8KB

FM_BASE + $00

DATA_FLASH_START + $0FFF

DATA_FLASH_START + $0000

Data Memory

Program Memory

Note: Data Flash is

NOT available in the

56F8135 device.

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