Motorola MCF5281 用户手册
MOTOROLA
Chapter 6. ColdFire Flash Module (CFM)
6-3
Block Diagram
An erased Flash bit reads 1 and a programmed Flash bit reads 0. The CFM features a sense
amplifier timeout (SATO) block that automatically reduces current consumption during
reads at low system clock frequencies.
amplifier timeout (SATO) block that automatically reduces current consumption during
reads at low system clock frequencies.
Figure 6-1. CFM Block Diagram
Flash Interface
•
•
•
SATO
SATO
SATO
SATO
BIST
Engine
Internal Bus
Memory Array
Backdoor Access
Flash Control Registers
Block 0H
32K x 16
32K x 16
Memory Array
Block 0L
32K x 16
Memory Array
Block 3H
32K x 16
32K x 16
Memory Array
Block 3L
32K x 16
Flash Physical
Block 0
Flash Physical
Block 3
Note:
Mass Erase Block 0 (256 Kbytes) = Flash Physical Block 0 and Flash Physical Block 1.
Mass Erase Block 1 (256 Kbytes) = Flash Physical Block 2 and Flash Physical Block 3 (MCF5282 only)
Mass Erase Block 1 (256 Kbytes) = Flash Physical Block 2 and Flash Physical Block 3 (MCF5282 only)
V
DDF
V
SSF