ADSP-BF561 EZ-KIT Lite Evaluation System Manual
2-3
EZ-KIT Lite Hardware Reference
External Bus Interface Unit
The External Bus Interface Unit (EBIU) connects an external memory to
the ADSP-BF561 processor. It includes a 32-bit wide data bus, an address
bus (
A25–A2
), and a control bus. All 8-bit, 16-bit, and 32-bit accesses are
supported. On the EZ-KIT Lite board, the EBI unit is connected to
SDRAM and flash memory. For more information on using the external
memory see
All of the address, data, and control signals are available externally via the
extender connectors (
J3
–
J1
). The pinout of these connectors can be found
SPORT0 Audio Interface
The
SPORT0
interface connects to the AD1836A audio codec, the SPORT
connector (
P3
), and the expansion interface. The AD1836A codec uses
both the primary and secondary data transmit and receive pins to input
and output data from the audio input and outputs.
The pinout of the SPORT connector and the expansion interface connec-
tors can be found in Appendix B,
.
SPI Interface
The processor’s Serial Peripheral Interconnect (SPI) interface connects to
the AD1836A audio codec and the expansion interface. The SPI connec-
tion to the AD1836A is used to access the control registers of the device.
The
PF4
flag of the processor acts as the devices select for the SPI port.
The SPI signals are available on the expansion interface. The pinout for
the expansion interface can be found in Appendix B,
