參數(shù)資料
型號(hào)： UPD754244
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 4位單晶片微控制器
文件頁(yè)數(shù)： 29/88頁(yè)
文件大小： 416K
代理商： UPD754244
29
μ
PD754144, 754244
8. INTERRUPT FUNCTION AND TEST FUNCTION
Figure 8-1 shows the interrupt control circuit. Each hardware device is mapped in the data memory
space.
The interrupt control circuit of the
μ
PD754244 has the following functions.
(1) Interrupt function
Vectored interrupt function for hardware control, enabling/disabling the interrupt acknowledgement by
the interrupt enable flag (IE
×××
) 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 (IRQ
×××
). An interrupt generated can be checked by software.
Release the standby mode. A release interrupt can be selected by the interrupt enable flag.
(2) Test function
Test request flag (IRQ2) generation can be checked by software.
Release the standby mode. The test source to be released can be selected by the test enable flag.
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