MC9RS08KA8RM Datasheet, PDF (39/190 Pages) Freescale Semiconductor, Inc – MC9RS08KA8 Features

Chapter 4 Memory
14-bit memory address
Start address of memory block selected
000000
AD[13:6]
Figure 4-6. Memory Block Boundary Selector
Table 4-5 shows the memory block to be accessed through paging window ($00C0 – $00FF).
Table 4-5. Paging Window for $00C0–$00FF
Page
$00
$01
$02
$03
$04
.
.
.
$FE
$FF
Memory Address
$0000–$003F
$0040–$007F
$0080–$00BF
$00C0–$00FF
$0100–$013F
.
.
.
$3F80–$3FBF
$3FC0–$3FFF
NOTE
Physical location $0000-$000E is RAM. Physical location $000F is register
X. The D[X] register is mapped to address $000E only. The physical RAM
in $000E can be accessed through the D[X] register when the X register is
$0E or $CE with PAGESEL as $00.
When PAGESEL register is $00, the paging window is mapped to the first
page ($00 – $3F). Paged location $00C0 – $00CE is mapped to physical
location $0000 – $000E, that is, RAM. Paged location $00CF is mapped to
register X. Therefore, accessing address $CE returns the physical RAM
content in $000E. Accessing address $000E returns D[X] register content.
MC9RS08KA8 Series Reference Manual, Rev. 3
Freescale Semiconductor
39