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
Outside FX2
FFFF
7.5 kbytes
(OK to populate
USB regs and
4k EP buffers
(RD#,WR#)
data memory
here—RD#/WR#
strobes are not
active)
E200
E1FF
0.5 kbytes RAM
Data (RD#,WR#)*
E000
48 kbytes
External
Data
Memory
(RD#,WR#)
64 kbytes
External
Code
Memory
(PSEN#)
1FFF
(Ok to populate
data memory
here—RD#/WR#
strobes are not
active)
Eight kbytes
RAM
Data
(RD#,WR#)*
0000
Data
Code
*SUDPTR, USB upload/download, I2C-compatible interface boot access
Figure 3-2. External Code Memory, EA = 1
Document #: 38-08012 Rev. *C
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