CY7C68013
3.10.3
External Code Memory, EA = 1
The bottom eight kbytes of program memory is external, and therefore the bottom eight kbytes of internal RAM is accessible only
as data memory.
Inside FX2
FFFF
7.5 kbytes
USB regs and
4k EP buffers
(RD#,WR#)
E200
E1FF
0.5 kbytes RAM
E000 Data (RD#,WR#)*
Outside FX2
(OK to populate
data memory
here—RD#/WR#
strobes are not
active)
48 kbytes
External
Data
Memory
(RD#,WR#)
64 kbytes
External
Code
Memory
(PSEN#)
1FFF
Eight kbytes
RAM
Data
(RD#,WR#)*
(Ok to populate
data memory
here—RD#/WR#
strobes are not
active)
0000
Data
Code
*SUDPTR, USB upload/download, I
2
C-compatible interface boot access
Figure 3-2. External Code Memory, EA = 1
Document #: 38-08012 Rev. *C
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