AN2131-DK001 Cypress Semiconductor Corp, AN2131-DK001 Datasheet - Page 59
AN2131-DK001
Manufacturer Part Number
AN2131-DK001
Description
KIT EZ-USB DEVELOPMENT BOARD
Manufacturer
Cypress Semiconductor Corp
Datasheet
1.AN2131SC.pdf
(334 pages)
Specifications of AN2131-DK001
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
428-1333
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When EA=1 (Figure 3-5), all code (PSEN) memory is external. All internal EZ-USB
RAM is data memory. This gives the user over 6-KB of general-purpose RAM, accessible
by the MOVX instruction.
Page 3-6
Note
Figures 3-4 and 3-5 assume that the EZ-USB chip uses isochronous endpoints, and there-
fore that the ISODISAB bit (ISOCTL.0) is LO. If ISODISAB=1, additional data RAM
appears internally at 0x2000-0x27FF, and the RD#, WR#, CS#, and OE# signals are
modified to exclude this memory space from external data memory.
1FFF
FFFF
1F3F
1B40
8000
7B40
2000
0000
Note 1: OK to populate data memory here--RD#, WR#, CS# and OE# are inactive.
Unused Bulk Buffers
Inside EZ-USB
Registers(RD,WR)
Data (RD,WR)
(RD,WR)
Figure 3-5. EZ-USB Memory Map with EA=1
Chapter 3. EZ-USB Memory
(RD, WR)
(RD,WR)
External
Memory
(Note 1)
External
Memory
(Note 1)
Data
Data
Outside EZ-USB
External
Memory
(PSEN)
Code
EZ-USB TRM v1.9
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