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參數(shù)資料
| 型號(hào)： | AT75C1010 |
| 英文描述： | AT75C1010 Telephony Software Module [Updated 11/01. 29 Pages] This software module runs on the OakDSPCore subsystem of the AT75 series SIAP. expanding its capabilities and making the processor flexible and east to integrate into most operating systems. |
| 中文描述： | AT75C1010電話軟件模塊[更新11/01。 29頁]本軟件模塊上運(yùn)行的AT75系列OakDSPCore子系統(tǒng)統(tǒng)計(jì)所。擴(kuò)大其能力，使處理器的靈活和東部地區(qū)融入大多數(shù)操作系統(tǒng)。 |
| 文件頁數(shù)： | 54/171頁 |
| 文件大?。?/td> | 1288K |
| 代理商： | AT75C1010 |
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147
AT75C DSP Subsystem
1368C–INTAP–08/02
Trace Reading and
Decoding Algorithm
Trace reading and decoding requires several operations that must be done sequentially.
In order to decode the addresses written in the trace buffer correctly, reading should
take place in the sequence below:
1.
Read the tag (bit 0, TREI, in STATUS1 register).
2.
Read the PFT register, which holds the most recent entry in the trace buffer.
The read operation updates the PFT register and the tag so as to reflect the next entry
of the trace buffer.
This operation (reading TREI and trace one by one) should be repeated 16 times in
order to read the whole buffer.
Decoding of the program flow should start from the last address that was read from the
buffer (e.g., last entry to the buffer) and proceed backwards.
The addresses that are saved in the trace buffer can be single entry with the tag bit
equal to 1, or double entry with the tag bits equal to 0 for both entries.
By using this tag bit, the user can differentiate between single and double entries of the
buffer.
Completion of the program flow is done by filling the sequential instructions from the
program list between the branches.
Notice that sometimes one or more lines at the beginning of the buffer (addresses first
read from the buffer) may contain only 1s, including the tag bit. It means that those lines
were not used since the previous buffer’s reading and do not contain any information.
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