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AM85C30 데이터시트(PDF) 156 Page - Advanced Micro Devices

부품명 AM85C30
상세설명  Serial Communications Controller
PDF  194 Pages
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제조업체  AMD [Advanced Micro Devices]
홈페이지  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM85C30 데이터시트(HTML) 156 Page - Advanced Micro Devices

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SCC Application Notes
AMD
7–7
7.2
POLLED ASYNCHRONOUS MODE
7.2.1
Introduction
This section describes the use of the SCC in polled Asynchronous mode. The device can
be set with 5 to 8 bits per character, 1, 1-1/2, or 2 stop bits, and a wide range of baud
rates. In this particular example, 8 bits per character, 2 stop bits and 9600 baud rate are
used. An external 2.4576 MHz, crystal oscillator is used for baud-rate generation. The
SCC can be programmed for local loopback for on-board diagnostics. The user can make
use of this feature to test-program the part without additional hardware to simulate an ac-
tual transmit and receive environment.
Table 7–3. SCC Register Reset Values
0
0
0
0
0000
7
6
5
4
3210
WR0
Register
Hardware Reset
00
0
0
WR1
WR2
0
WR3
WR4
0
WR5
WR6
WR7
11
0
0
WR9
WR10
WR11
WR12
WR13
0
WR14
0
WR15
RR0
RR1
RR3
0
RR10
01
0
0
00
00
0
0
0
0
0
0
0
0000
7
6
5
4
3210
Channel Reset
00
0
0
0
0
0
0
0
0
01
0
0
0
00
00
0
0
0
00
1
0
000
00
0
0
0
0
0
0
00
0
0
0
0
10
00
10
0
0
0
10
11
1
1
1
0
0
01
0
0
0
1
1
0
0
0
0
00
00
0
00
00
0
0
0
00
00
1
1
10
1
11
11
0
0
0
10
0
0
0
00
0
0
0
0
000
1



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