參數資料
型號: T83C5101ZZZ-3ZSIL
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDIP24
封裝: DIP-24
文件頁數: 51/52頁
文件大?。?/td> 701K
代理商: T83C5101ZZZ-3ZSIL
8
Rev. F - 12 March, 2001
T87C5101
T83C5101/02
Figure 2. Mode Switching Waveforms
The X2 bit in the CKCON register (See Table 2.) allows to switch from 12 clock cycles per instruction to 6 clock
cycles and vice versa. At reset, the standard speed is activated (STD mode). Setting this bit activates the X2 feature
(X2 mode).
CAUTION
In order to prevent any incorrect operation while operating in X2 mode, user must be aware that all peripherals
using clock frequency as time reference (UART, timers, PCA...) will have their time reference divided by two.
For example a free running timer generating an interrupt every 20 ms will then generate an interrupt every 10 ms.
UART with 4800 baud rate will have 9600 baud rate.
For further details on the X2 feature, please refer to ANM072 available on the web (http://www.atmel-wm.com)
XTAL1:2
XTAL1
CPU clock
X2 bit
X2 Mode
STD Mode
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