Specifications

Altera Corporation 11
EPXA1 Development Board Hardware Reference Manual
In addition, the EPXA1 device provides a variety of peripherals, as listed
in Table 2.
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Refer to the Excalibur Devices Hardware Reference Manual for details about
EPXA1 devices.
Prototyping Area
This area can be used to develop and test custom circuitry, such as I/O
interfaces, using the EPXA1 development board. The prototyping area has
both 3.3-V and 5-V supply, plus ground connections, 32 I/O pins that
facilitate connection to the Excalibur device, and a reset pin in a 6 × 15
matrix. Figure 2 shows the prototyping area on the development board.
Table 2. EPXA1 Device Peripherals
Peripheral Description
ARM922T 32-bit RISC processor For speed grade –1: up to 200 MHz
For speed grade –2: up to 166 MHz
Interrupt controller Used for the interrupt system
Internal single-port SRAM 32 Kbytes
Internal dual-port SRAM 16 Kbytes
SDRAM controller Interfaces between the internal system bus and SDRAM
External SDRAM Refer to the Excalibur Devices Hardware Reference Manual for details of
supported sizes
Expansion bus interface (EBI) Interfaces to the flash memory and the Ethernet
External flash memory Refer to the Excalibur Devices Hardware Reference Manual for details of
supported sizes
Watchdog timer Protects the system against software failure
UART Facilitates serial communication
Reset controller Resets the device