External Memory - Analog Devices ADSP-21262 EZ-KIT Lite Manual

External Memory

External Memory
The EZ-KIT Lite contains three types of memory: parallel flash (1 MB),
serial peripheral interconnect (SPI) flash (2M bit), and synchronous ran-
dom access memory (SRAM) (512K bit). Flash memories can store
user-specific boot code, allowing the board to run as a standalone unit.
For more information about setting the boot device for the processor, see
"Boot Mode and Clock Ratio Select Switch (SW10)" on page
Table 1-1 provides a map of the board's external memory.
Table 1-1. EZ-KIT Lite Evaluation Board External Memory
Start Address End Address
0x0100 0000 0x010F FFFF
0x0120 0000 0x012F FFFF
0x0140 0000 0x0140 FFFF
0x0160 0000 0x017F FFFF
0x0180 0000 0x019F FFFF
The parallel flash memory and the SRAM connect to the parallel port of
the processor. The parallel port is a multiplexed address and data port.
The port can connect to 8-bit and 16-bit memory devices. When config-
uring the parallel port, keep in mind that the memory devices on the
board are 8 bits wide.
To access the SRAM and flash memories, set up a parallel port DMA. For
more information on how to connect the SRAM and flash memories, see
"Parallel Port" on page
The SPI flash memory connects to the processor's SPI port and uses
as a chip select. In order for
bit in the
PPFLG
1-12
Content
Flash memory
SRAM memory
LEDs; see
Unused chip select 1
Unused chip select 2
2-3.
FLAG0
register.
SYSCTL
ADSP-21262 EZ-KIT Lite Evaluation System Manual
"LEDs and Push Buttons" on page
to behave as a chip select, clear the
2-11.
1-15.
FLAG0