SD188ES/SD188EM Demonstration Board User’s Manual
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1.1
ROM Space
The SD188ES/SD188EM demonstration board contains on-board ROM space for
use by the E86MON software and application code. This ROM space is
implemented as one Am29F010 70-ns Flash memory device.
This Flash memory device is mapped to the upper region of addressable memory
at E0000h to FFFFFh. The Flash memory device is organized as 128K x 8 bits
(eight, 16K sectors) and is connected to the UCS (Upper Memory Chip Select) signal
of the microcontroller. After a valid reset, the Am188ES or Am188EM microcontroller
fetches the first instruction from the Flash memory device by asserting UCS and driving
the address bus with the value FFFF0h.
The E86MON software enables you to program the Flash memory device with
specific types of hex files. Intel hex and Intel extended hex format files are
supported. This software functionality is provided to eliminate the need to remove
the Flash memory device. Do not attempt to remove the TSOP Flash or SRAM
(U3, U4, U7, and U8) memory devices because doing so may cause damage to the
board.
SRAM
The SD188ES/SD188EM demonstration board utilizes SRAM for its read/write
storage. The board provides 128 Kbyte of SRAM using one 70-ns device that is
mapped from 0h to 1FFFFh. The SRAM device is organized as 128K x 8 bits and
is attached to the LCS (Lower Memory Chip Select) signal of the microcontroller. For
every access to the above address range, the Am188ES and Am188EM microcontrollers
will assert LCS.
NOTE:
SRAM available to you includes 410h to 1F400h. See the E86MON
TM
Software User’s Manual included in your kit for more information.
frtbook : newch2 Page 7 Monday, June 2, 1997 3:37 PM