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| 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(yè)數(shù)： | 9/88頁(yè) |
| 文件大?。?/td> | 1701K |
| 代理商： | BENCHMARKING |
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9
The 186EM Timing Unit
Capabilities
The Am186EM timer has exactly the same capabilities as the standard
Am80186. These features include: 3 channels, 2 external pairs of inputs and
outputs, programmable duty cycle and external or internal clocking. The
Am186EM timers have also been enhanced to allow clocking at the extremely
high speed the CPU is capable of, 40Mhz!
The timers will be used to measure the benchmarks run in this application note.
NOTE: If your benchmark run time is under 15 uS, place a loop around the code
and run through it a number of times.
Addressing
The Am186EM uses a programmable address register to fix the upper 8 bits of
the internal register array. It is assumed that this register is left in the default or
reset state (FFh). The registers which control each timer are addressed by the
address register as the upper 8 bits and the offset into the Am186EM’s register
array as the lower eight bits of the address.
The following ‘C’ code is an example which could be placed in a header file and
included in any code using the timer unit.
The supplied programs use the header file "am186em.h" for all addressing.
// example header file for timer addressing
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