參數(shù)資料
型號(hào)： UPD753304P
廠商： NEC Corp.
元件分類： 4位微控制器
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述： 4位單片機(jī)的小型通用紅外遙控器
文件頁(yè)數(shù)： 25/56頁(yè)
文件大小： 374K
代理商： UPD753304P
25
μ
PD753304
7. INTERRUPT FUNCTION AND TEST FUNCTION
The
μ
PD753304 has three different interrupt sources and one types of test source.
The interrupt control circuit of the
μ
PD753304 has the following functions.
(1) Interrupt function
Vectored interrupt function for hardware control, enabling/disabling the interrupt acceptance by the
interrupt enable flag (IExxx) and interrupt master enable flag (IME).
Can set any interrupt start address.
Multiple interrupts wherein the order of priority can be specified by the interrupt priority select register (IPS).
Test function of interrupt request flag (IRQxxx). An interrupt generation can be checked by software.
Release the standby mode. An interrupt to be released can be selected by the interrupt enable flag.
(2) Test function
Test request flag (IRQxxx) generation can be checked by software.
Release the standby mode. The test source to be released can be selected by the test enable flag.
Figure 7-1. Interrupt Control Circuit Block Diagram
Internal bus
Interruput enable flag
(IE
xxx
)
IRQBT
IRQ1
IRQT0
IRQW
INT1/P103
Standby release
signal
Priority control
circuit
Vector table
address
generator
Decoder
IME IPS
IST0
VRQn
IM1
1
INTBT
IST1
INTT0
INTW
Edge
detector
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