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參數(shù)資料
| 型號(hào)： | 22450C |
| 英文描述： | MicroManager Chip |
| 中文描述： | 手動(dòng)？lanSC520微控制器的客戶(hù)開(kāi)發(fā)平臺(tái)（CDP）的用戶(hù)手冊(cè) |
| 文件頁(yè)數(shù)： | 43/78頁(yè) |
| 文件大小： | 1849K |
| 代理商： | 22450C |
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élanSC520 Microcontroller Customer Development Platform User’s Manual
2-11
High-Speed UART
The High-Speed UART (port 0, COM1) is embedded in the élanSC520
microcontroller. The High-Speed UART port enables you to communicate at a
speed of up to 1.152 Mbit/s through balanced RS-422A-compliant serial ports with
other serial communication equipment, for a longer distance and faster speed. You
can make the High-Speed UART port pin-compatible with the RS-232 by setting
the external pin strap. For connector location, refer to Figure 2-2 on page 2-4 and
Figure 2-3 on page 2-5.
NOTE:
The BIOS included with CDP version 1.4 maps the microcontroller’s
UARTs to COM1 and COM2. Earlier BIOS versions, used on boards with
microcontroller revisions A0 and A1, disabled the microcontroller’s UARTs and
mapped the Super I/O UARTs to COM1 and COM2 instead.
Low-Speed UART
The low-speed UART (port 1, COM2) is embedded in the élanSC520
microcontroller. The low-speed UART port enables you to communicate at a lower
speed of up to 460 Kbit/s through a single-ended RS-232-compliant serial port.
The low-speed UART is capable of high-speed, like the High-Speed UART port,
but is restricted through a low-speed transceiver that limits this High-Speed UART
channel to a lower speed for the purpose of communicating with specific serial
communication equipment.
NOTE:
The BIOS included with CDP version 1.4 maps the microcontroller’s
UARTs to COM1 and COM2. Earlier BIOS versions, used with microcontroller
revisions A0 and A1, disabled the microcontroller’s UARTs and mapped the Super
I/O UARTs to COM1 and COM2 instead.
Hexadecimal LED Display
The hexadecimal LED display is a single-byte (two digits) hexadecimal LED
address at 80h and 680h. The hexadecimal LED display (error code display)
provides indications for CPU status as well as debugging status, which improves
the debugging process.
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