MB91F467DA datasheet(31/140 Pages) FUJITSU

31 / 140 page

MB91460D Series

DS07-16612-2E

■ EMBEDDED PROGRAM/DATA MEMORY (FLASH)

Flash features

• MB91F467Dx:

1088 Kbytes (16

× 64 Kbytes + 8 × 8 Kbytes) = 8.5 Mbits

• MB91F465DA:

544 Kbytes (8

× 64 Kbytes + 4 × 8 Kbytes) = 4.25 Mbits

• Programmable wait state for read/write access

• Flash and Boot security with security vector at 0x0014:8000 - 0x0014:800F

• Boot security

• Basic specification: Same as MBM29LV400TC (except size and part of sector configuration)

Operation modes

(1) 64-bit CPU mode (available on MB91F467Dx only) :

• CPU reads and executes programs in word (32-bit) length units.

• Flash writing is not possible.

• Actual Flash Memory access is performed in d-word (64-bit) length units.

(2) 32-bit CPU mode :

• MB91F465DA: CPU reads and executes programs in word (32-bit) length units.

MB91F467Dx: CPU reads, writes and executes programs in word (32-bit) length units.

• Actual Flash Memory access is performed in word (32-bit) length units.

(3) 16-bit CPU mode :

• CPU reads and writes in half-word (16-bit) length units.

• Program execution from the Flash is not possible.

• Actual Flash Memory access is performed in half-word (16-bit) length units.

Note: The operation mode of the flash memory can be selected using a Boot-ROM function. The function start

address is 0xBF60. The parameter description is given in the Hardware Manual in chapter 54.6 "Flash

Access Mode Switching".

MB91F467DA Datasheet(PDF) 31 Page - fujitsu semiconductor