EZ-KIT Lite Hardware Reference
The CLKIN pin of the processor connects to a 24.576 MHz oscillator. The core frequency of the processor is derived by multiplying the frequency at the CLKIN pin by a value determined by the state of the processor pins CLKCFG1 and CLKCFG0. The value at these pins is determined by the state of the SW2 switch (see “Boot Mode and Clock Ratio Select Switch (SW2)” on page 2-8). By default, the EZ-KIT Lite gives a core frequency of
393.216 MHz. It is possible to change the speed of the processor by changing the value of the PMCTL register.
The SW2 switch also configures the boot mode of the processor. The EZ-KIT Lite is capable of EPROM/flash boot and SPI boot. By default, the EZ-KIT Lite boots from the flash memory. For information about configuring the boot modes, see “Boot Mode and Clock Ratio Select Switch (SW2)” on page 2-8.
External Port
The external port of the ADSP-21369 processor consists of a 24-bitaddress bus, 32-bitdata memory bus, and control lines. The control lines are used to select, read, and write to external memory devices.
The external port connects to an 8-bit parallel flash memory, an 8-bit SRAM memory, and a 32-bit SDRAM memory. See “External Memory” on page 1-7for more information about accessing the flash and SDRAM memories.
All of the external port signals are available externally via the expansion interface connectors (J3–1). The pinout of the connectors can be found in “Schematics” on page B-1.
ADSP-21369 EZ-KIT Lite Evaluation System Manual | 2-3 |