Analog Devices ADSP-21992 EZ-KIT LITE, Системное руководство, Страница: 41 / 87

ADSP-21992 EZ-KIT Lite Evaluation System Manual 2-3
Using the EZ-KIT Lite
Additionally, breakpoints within two instructions of an I/O access are
restricted. In the following example, a breakpoint at 100 is acceptable, but
a breakpoint at
101
or
102
is restricted.
100 DM(0x8000)=I0; /* or I0=DM(0x8000); */
101 NOP;
102 NOP;
Memory Map
The ADSP-21992 processor has 48K words of internal SRAM that can be
used for program storage or data storage. The configuration of internal
SRAM is detailed in the ADSP-2199x Mixed Signal DSP Controller Hard-
ware Reference.
The ADSP-21992 EZ-KIT Lite board contains 512K x 8 bits of external
Flash memory. These flash memory ICs are connected to the boot mem-
ory select (BMS) pin or the memory select 0 (MS0) pin via a two-input
AND gate (U1). Jumper JP31 is placed on the MS0 line to disconnect the
MS0 pin if required. The flash memory can be accessed in either the boot
memory space or the external memory space.
If booting from the external flash memory IC, JP31 can be left open. In
this case, the external SRAM provided on the ADSP-21992 EZ-KIT Lite
board can be mapped to any of the external memory banks using one of
the jumpers (JP24 - JP27).
If not booting from the flash memory, but using it as external program or
data memory, JP31 must be closed. In this case, do not map the external
SRAM provided on the ADSP-21992 EZ-KIT Lite board to external
memory bank 0 (JP24 should be open in this case); instead, map it to any
of the other external memory banks using one of the jumpers (JP25 -
JP27).
!
Only 8K of program memory is available in the EZ-KIT Lite software.