Flash Array and Control
MPC5510 Microcontroller Family Reference Manual, Rev. 1
22-2
Freescale Semiconductor
Preliminary
Figure 22-1. Flash Segmentation
22.2
Block Diagram
shows a block diagram of the flash memory module. The FBIU is addressed through the
system bus while the flash control and status registers are addressed through the slave (peripheral) bus.
Figure 22-2. Flash System Block Diagram
Low-address space
High-address space
Mid-address space
Flash array blocks
Low-address space — 256 KB
Mid-address space — 256 KB
High-address space — 1 MB
8x1 2x64 KB
2x128 KB
8x128 KB
Flash bus
interface
unit
(FBIU)
Flash memory
Flash memory block
Flash core
Control/status
registers
interface
(MI)
V
FLASH
V
SS
V
DD
V
PP
Slave
bus
System
bus
Note: V
PP
is the only externally visible power supply that is necessary for the
programming and erasing of the flash array (see
.”)