SD186ES/SD186EM Advanced Micro Devices, SD186ES/SD186EM Datasheet - Page 19

• Manufacturer Part Number: SD186ES/SD186EM
• Description: SD186ES/SD186EM Demonstration Board Users Manual
• Manufacturer: Advanced Micro Devices

ROM Space
SRAM
The SD186ES/SD186EM demonstration board contains on-board ROM space for
use by the E86MON software and application code. This ROM space is
implemented as two Am29F010 70-ns Flash memory devices.
The Flash memory devices are mapped to the upper region of addressable memory
at C0000h to FFFFFh. This range represents the top sector in both Flash memory
devices. Each 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 Am186ES or Am186EM microcontroller fetches
the first instruction from the Flash memory devices by asserting UCS and driving the
address bus with the value FFFF0h.
The E86MON software enables you to program the Flash memory devices 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 devices. Do not attempt to remove the TSOP Flash memory or
SRAM devices (U3, U4, U7, and U8) because doing so may cause damage to the
board.
The SD186ES/SD186EM demonstration board utilizes SRAM for its read/write
storage. The board provides 256 Kbyte of SRAM using two 70-ns devices that are
mapped from 0h to 3FFFFh. The SRAM devices are organized as 128K x 8 bits
and are attached to the LCS (Lower Memory Chip Select) signal of the microcontroller.
For every access to the above address range, the Am186ES and Am186EM
microcontrollers will assert LCS.
NOTE: SRAM available to you includes 410h to 3F400h. See the E86MON
Software User’s Manual included in your kit for more information.
SD186ES/SD186EM Demonstration Board User’s Manual
2-7
TM