參數(shù)資料
型號: MD83C154XXX-20P883D
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CDIP40
封裝: 0.600 INCH, CERAMIC, DIP-40
文件頁數(shù): 70/142頁
文件大?。?/td> 61013K
代理商: MD83C154XXX-20P883D
33
XMEGA B3 [DATASHEET]
8074D–AVR–08/2013
15.4
Input sensing
Input sensing is synchronous or asynchronous depending on the enabled clock for the ports, and the configuration is
Figure 15-7. Input sensing system overview
When a pin is configured with inverted I/O, the pin value is inverted before the input sensing.
15.5
Alternate Port Functions
Most port pins have alternate pin functions in addition to being a general purpose I/O pin. When an alternate function is
enabled, it might override the normal port pin function or pin value. This happens when other peripherals that require pins
are enabled or configured to use pins. If and how a peripheral will override and use pins is described in the section for
that peripheral. “Pinout and Pin Functions” on page 54 shows which modules on peripherals that enable alternate
functions on a pin, and which alternate functions that are available on a pin.
INVERTEDI/O
Interrupt
Control
IREQ
Event
Pn
D Q
R
D Q
R
Synchronizer
INn
EDGE
DETECT
Asynchronous sensing
Synchronous sensing
EDGE
DETECT
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