AN2131-DK001 Cypress Semiconductor Corp, AN2131-DK001 Datasheet - Page 60

• Manufacturer Part Number: AN2131-DK001
• Description: KIT EZ-USB DEVELOPMENT BOARD
• Manufacturer: Cypress Semiconductor Corp

Specifications of AN2131-DK001

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 428-1333

The EZ-USB 8-KB Masked ROM and 32-KB Masked ROM memory maps are shown in
Figures 3-6 and 3-7.
EZ-USB ROM versions contain program memory starting at 0x0000. In these versions,
the internal RAM is implemented as data-only memory.
Code for this ROM version can be developed and tested using the AN2131Q with an
external code memory (EA=1, Figure 3-5). As long as the 8051 limits internal RAM
access to 0x0000-0x07FF and accesses the EZ-USB registers and bulk data at 0x7B40-
0x7FFF, the code in the external memory will be the identical image of the code that will
ultimately be internal at 0x0000-0x1FFF in the ROM version.
EZ-USB TRM v1.9
3.5
FFFF
7B40
8000
2000
0800
07FF
0000
EZ-USB ROM Versions
Inside EZ-USB
Registers(RD,WR)
Data (RD,WR)
Note 1: OK to populate data memory here, but no RD# or WR# strobes are generated.
Note 2: OK to populate code memory here, but no PSEN# strobe is generated.
Figure 3-6. 8-KB ROM, 2-KB RAM Version
Memory(PSEN)
Chapter 3. EZ-USB Memory
Internal Code
(RD, WR)
(RD,WR)
External
Memory
(Note 1)
External
Memory
(Note 1)
Data
Data
Outside EZ-USB
External
Memory
(Note 2)
(PSEN)
Code
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