AN2131-DK001 Cypress Semiconductor Corp, AN2131-DK001 Datasheet - Page 61

• 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 32-KB ROM version contains program memory from 0x0000 through
0x7FFF, and data memory from 0x0000 through 0x0FFF.
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 0x0000-0x0FFF 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 0x0000-0x7FFF in the ROM version.
Page 3-8
FFFF
7FFF
7B40
8000
1000
0FFF
0000
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 3-7. 32-KB ROM, 4-KB RAM Version
Memory(PSEN)
Chapter 3. EZ-USB Memory
Internal Code
(RD, WR)
(RD,WR)
External
External
Memory
(Note 1)
Memory
(Note 1)
Data
Data
Outside EZ-USB
External
Memory
(Note 2)
EZ-USB TRM v1.9
(PSEN)
Code