參數(shù)資料
型號: UPD77210
廠商: NEC Corp.
元件分類: 數(shù)字信號處理
英文描述: 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
中文描述: 16位定點數(shù)字信號處理器
文件頁數(shù): 38/74頁
文件大?。?/td> 467K
代理商: UPD77210
Data Sheet U15203EJ3V0DS
38
μ
PD77210, 77213
8. GENERAL-PURPOSE PORT AND INTERRUPT
8.1 General-purpose Port Pins
The general-purpose port pins alternate with the interrupt or host interface pins.
The configuration of the general-purpose port is illustrated below.
Port I/O
Interrupt
controller
Port pin
Host I/O
OE
O
I
OE
O
I
Note
Note
P0 to P7 do not alternate with the host interfave pins.
8.2 Interrupt Pin
The general-purpose port pin functions as an interrupt pin and the signal input to the port is always input to the
interrupt controller. The interrupt controller recognizes the interrupt by detecting a falling edge.
The output of the general-purpose port or host interface pin can be also used as an interrupt input.
Pins HRD, HWR, ASOEN, ASIEN, TSOEN, and TSIEN are connected to the interrupt controller and can be used
as interrupt pins.
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