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參數(shù)資料
| 型號： | 90S1200 |
| 廠商： | Atmel Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 位AVR微控制器具有8K字節(jié)的系統(tǒng)內(nèi)可編程閃存 |
| 文件頁數(shù)： | 4/71頁 |
| 文件大?。?/td> | 1416K |
| 代理商： | 90S1200 |
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4
AT90S1200
0838H
–
AVR
–
03/02
Figure 2.
Oscillator Connections
Note:
When using the MCU Oscillator as a clock for an external device, an HC buffer should be
connected as indicated in the figure.
Figure 3.
External Clock Drive Configuration
On-chip RC Oscillator
An On-chip RC Oscillator running at a fixed frequency of 1 MHz can be selected as the
MCU clock source. If enabled, the AT90S1200 can operate with no external compo-
nents. A control bit (RCEN) in the Flash Memory selects the On-chip RC Oscillator as
the clock source when programmed (
“
0
”
). The AT90S1200 is normally shipped with this
bit unprogrammed (
“
1
”
). Parts with this bit programmed can be ordered as
AT90S1200A. The RCEN-bit can be changed by parallel programming only. When
using the On-chip RC Oscillator for Serial Program downloading, the RCEN bit must be
programmed in Parallel Programming mode first.
XTAL2
XTAL1
GND
C2
C1
MAX 1 HC BUFFER
HC
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