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| 型號： | 22505_1 |
| 英文描述： | AMD Test Interface Port Board Schematics? 149KB (PDF) |
| 中文描述： | AMD測試接口端口板原理圖？ 149KB（PDF格式） |
| 文件頁數(shù)： | 58/78頁 |
| 文件大小： | 2691K |
| 代理商： | 22505_1 |
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Test Interface Port Board User’s Manual
2-34
Timing
Certain 186 microcontroller boards require added wait states to accommodate the
timing specifications of the 16C550 UARTs. For example, on the SD186ED
demonstration board, the PCS and MCS Auxiliary (MPCS) register needs to be set
to a defined state by writing 8038h to physical location FFA8h. Then, insert three
wait states to the Peripheral Chip Select (PCS) register by writing 0073h to physical
location FFA4h. Refer to the 16C550 specification and the microcontroller manual
of the host board to determine the correct configuration and the appropriate method
of adding wait states.
Version Register
NOTE:
Currently, the Version register is only accessible by the Am186
microcontrollers.
The following are the 8-bit and 16-bit addresses for the Version register:
Address: 8-bit = 348h, 16-bit = 348h
The Version register contains the version of the code that is running in the M
ACH
programmable device and in the revision of the TIP board. This is a read-only
register. Table 2-15 lists the bit mappings for this register.
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