SD186ES Advanced Micro Devices, SD186ES Datasheet - Page 14

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

Layout and Placement
2-2
The design of the SD186ES/SD186EM demonstration board emphasizes ease of
use and small size. Refer to Figure 2 on page 2-3 for board layout and component
placement.
The SD186ES/SD186EM demonstration board has the Flash and SRAM memory
devices (U3, U4 and U7, U8) directly below the processor. This placement keeps
the memory devices as close as possible to the processor to minimize noise and
trace reflections. The 40-MHz fundamental mode crystal (Y1) is located to the
right of the processor. The expansion interface (J2 and J3) is located at the bottom
of the board for easy connection and access. Finally, the 5.5-mm power-supply
barrel connector (J1) is positioned in the upper, left corner of the board.
The RS-232 serial interfaces are positioned on the right of the board. Please note
that the ES version of the board features two serial ports (P0 and P1), which are
driven by the two asynchronous serial interfaces on the Am186ES microcontroller.
The Am186EM microcontroller provides one asynchronous serial interface so the
EM version of the board implements the serial port with a DB-9 connector (P1).
Table 2-1. SD186ES/SD186EM Demonstration Board Parts List
SD186ES/SD186EM Demonstration Board User’s Manual
Part
Number
CR1–CR10
J1
J2–J3
U1
U2
U3–U4
U5–U6
U7–U8
Y1
Description
Power and signal LEDs
Power connector
Expansion interface
Voltage supply supervisor (TI TL7705A)
Am186ES or Am186EM 40-MHz
microcontroller
Flash memory
RS-232 driver/receiver devices (MAX232)
SRAM
40-MHz fundamental mode crystal
For more
information, see
Page 2-13
Page 2-14
Page 2-10
Page 2-10
Page 2-4
Page 2-7
Page 2-8
Page 2-7
Page 2-10