參數(shù)資料
型號(hào)： BENCHMARKING
英文描述： Benchmarking the Am186EM: Using the Dhrystone V2.1 As An Example Application Note? 1.66MB (PDF)
中文描述： 基準(zhǔn)Am186EM：作為示例應(yīng)用注意Dhrystone的V2.1版本？ 1.66MB（PDF格式）
文件頁數(shù)： 6/88頁
文件大?。?/td> 1701K
代理商： BENCHMARKING
6
The Evaluation Kit
The Development Board
The SD186EM development board is a full function platform for code
development, architectural evaluation and benchmarking. The board includes
an Am186EM processor (40Mhz), memory, an RS-232 communications port,
eight LEDs and a standardized bus connection.
The eight LEDs are CR2 through CR10. CR2 is optionally used to signal
program start and CR3 is used to indicate program stop. Any LED can be turned
off or on, using the functions provided, to indicate other program conditions.
The Serial UART Port
The Am186EM has an internal UART which is used to communicate with the
board. This port can be polled or interrupt driven at user selectable speeds from
300 to 115,200 baud.
As shipped, the EMON monitor software operates the serial port at 19,200 baud.
When the board is programmed with PDREM the port operates at 115,200 baud.
The Memory System
The SD186EM is supplied with 128K X 16 of 70ns AMD Flash and 128K X 16 of
70ns SRAM. This memory configuration allows the SD186EM platform to run full
speed, making it suitable for performance benchmarking.
The Am186EM has programmable wait-state registers as a standard feature.
The programmer wishing to use the platform for the purpose of benchmarking
can initialize these registers before invoking the code under test. Wait-state
selection inserts predictable memory delays allowing performance evaluation of
proposed targets with less expensive memories.
Optional User Wiring
The evaluation kit, as supplied, does not connect timers 1 and 0 together. For
short benchmarks with run times less than 40 seconds, no connection is
necessary. For much longer run times, solder a jumper between pin 6 and pin 8
on row ‘B’ of J3 (the larger connector site at the opposite end of the board from
the RS-232 connector). This connects the timer 1 output to the timer 0 input.
EMON Monitor
As delivered, the SD186EM development board powers up running the ‘EMON’
monitor. ‘EMON’ provides both debugging capability and user interface.
Because the user interface is transmitted from the target board, only a simple
modem communication or terminal emulation program needs to be run on the
host.
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