Motorola MPC564EVB Manuel d'utilisateur télécharger pdf (Page 10)

MPC562BC 10/31/02

Memory and Default Memory Map

The MPC562BC board provides one external memory bank of 16M Byte flash memory. The MPC562 chip select CS0 is applied to

the external memory bank. The MPC562BC board requires that start-up code be available in the external memory bank at all times.

The Monitor provided will protect itself from being erased or programmed over. User must use caution not to bulk erase the

external flash memory devices in user code or the board may become inoperable. In the case of a complete external flash erasure,

the BDM must be applied to recover the operation.

MPC562BC Memory Map

Internal Memory (See MPC562 microcontroller documentation)

0000 0000

Reserved

002F C000

On-chip Control and Status Registers (see MPC562 device manual)

003F 8000

Monitor SRAM: 0x3F8000 > 0x3F9FFF (8K bytes)

003F A000

User SRAM 0x3fA000 > 0x3FFFFF (24K bytes)

External Memory

FF00 0000

USER MEMORY SPACE

CS0 – External Flash Memory – 32 bit port, devices U2-U3

15M bytes at 0xFF00:0000 > 0xFFEF:FFFF

FFF0 0000

MONITOR MEMORY SPACE

CS0

– External Flash Memory – 32 bit port, devices U2-U3

1M bytes at FFF0:0000–FFFF:FFFF

FFFF FFFF

Note: Shaded areas are user memory space.

Flash Memory

The Flash Memory Bank consists of two Am29LV640M flash memory devices installed as U2 and U3 on the MPC563BC board.

These devices require a 32 bit wide port and must be written in 32 bit word size data as two parallel 16 bit devices. Read operations

are possible in bytes, half words, or words. Wait states (6) are required to access in asynchronous mode and burst type access is not

allowed. Refer to the specific device data sheet and sample software provided for configuring the flash memory.

User should note that the Debug Monitor firmware is installed in these same flash devices and the user must prevent removal of the

utility boot block section. Development tools or user application programs may overcome the monitor self-protection and erase or

corrupt the Debug Monitor. If the Debug Monitor becomes corrupted and monitor operation is desired, the firmware must be

programmed into the flash again by applying a BDM cable and supporting host software. The files required to reload the monitor in

the flash erased state are provided on the support CD. User should use caution to avoid the reprogramming of the monitor s situation.

Due to the application of the flash as parallel 16 bit wide devices, the sector size is doubled. Each flash sector is 128K bytes or

0x20000 hex is size. This fact should be noted when applying the dBUG monitor FL commands. Following is an example of the

USER flash sector size and address locations:

Sector 0 = 0xFF00 0000 > 0xFF01 FFFF

Sector 1 = 0xFF02 0000 > 0xFF03 FFFF

Sector 2 = 0xFF04 0000 > 0xFF05 FFFF … Sector 119 = 0xFFEE 0000 > 0xFFEF FFFF

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17

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Motorola MPC564EVB Manuel d'utilisateur Page 10

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