Preliminary - Information Subject to Change - 9/24/98
5 - 2
EZ-USB Development Board
The Anchor Chips EZ-USB Development Board provides a
compact evaluation and design vehicle for the EZ-USB Integrated
Circuit family. The board uses the 80-pin AN2131Q chip, and
provides expansion and interface signals on five 20-pin headers. A
mating prototype board allows quick construction and testing of
USB designs. All IC’s on the board operate at 3.3 volts. The board
may be powered from the USB connector or an external power
supply.
The EZ-USB Development Board is supplied as part of the Anchor
Chips Xcelerator
TM
Development Kit, which includes an evaluation
version of Anchor-customized software development tools from
Keil Software Inc. The Keil 8051 assembler, C and debugger work
in concert with the development board to provide a complete code
development environment. An 8051 debug monitor is typically
loaded into development board expansion RAM to leave the
internal EZ-USB RAM free for code development. Even though
you can use only 2K of internal 8K RAM with the evaluation
version of the Keil tools, the full retail version allows code of any
size to be located anywhere.
Board Overview
The EZ-USB Development Board contains the following
components:
1. AN2313Q EZ-USB Integrated Circuit, which includes a high
performance 8051 core.
2. 64 Kilobytes of 8051 Expansion RAM (two 32 Kilobyte RAM
chips).
3. RS-232 level converters for the two 8051 UARTS. UART
signals are brought out on two DB-9 female connectors.
4. DIP Switches to select RAM memory maps and EEPROM I
2
C
address.
5. Two I
2
C bus 8-bit IO expander chips. One drives a seven-
segment LED, the other reads eight switches.
