AN2408 Freescale Semiconductor / Motorola, AN2408 Datasheet - Page 15

• Manufacturer Part Number: AN2408
• Description: Examples of HCS12 External Bus Design A Companion Note to AN2287/D
• Manufacturer: Freescale Semiconductor / Motorola

Figure 14
even though the clock stretching is enabled, significant reduction in access time is available, depending
on SRAM access speed.
Freescale Semiconductor
Memory Map
00
10
is a logic analyzer trace showing expanded wide mode access with ECS gating. Notice that
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Figure 14. Expanded Wide Word Access with ECS/XCS
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External RAM
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Examples of HCS12 External Bus Design, Rev. 2
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Figure 15. Memory Map of
0A
1A
0B
1B
0C
1C
Example #5 — Word-Wide SRAM Interface (Wide Mode) XCS/ECS Gated
0D
1D
0E
1E
0F
1F
0000
FFFF
3E
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3F
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Figure 14
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Internal Flash
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3A
3B
3C
3D
3E
3F
PPAGE
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