mpc82x54a Megawin Technology, mpc82x54a Datasheet - Page 30

• Manufacturer Part Number: mpc82x54a
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

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interrupt. Neither of these flags is cleared by hardware when the service routine is vectored to.
The service routine should poll them to determine which one to request service and it will be
cleared by software.
All of the bits that generate interrupts can be set or cleared by software with the same result
as done through it by hardware. In other words, interrupts or pending interrupts can be
generated or canceled in software.
The following content describes several SFR related to interrupt mechanism.
SFR: IE (Interrupt Enable)
EA:=Global interrupt controller.
EPCA_LVD:=Interrupt controller of Programmable Counter Array (PCA) and Low-Voltage
ESPI_ADC:= Interrupt controller of Serial Peripheral Interface (SPI) and A/D Converter (ADC).
ES:=Interrupt controller of Universal Asynchronous Receiver/Transmitter (UART).
ET1:=Interrupt controller of Timer-1 interrupt.
EX1:=Interrupt controller of external interrupt-1.
Bit-7
EA
0:=(default)
1:=
0:=(default)
1:=
0:=(default)
1:=
0:=(default)
1:=
0:=(default)
1:=
0:=(default)
1:=
Disable all interrupts
Release interrupt control to all individual interrupt controllers.
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
Disable
Enable
EPCA_LVD ESPI_ADC
Detector
Bit-6
Bit-5
MPC82x54A Data Sheet
Bit-4
ES
Bit-3
ET1
Bit-2
EX1
Bit-1
ET0
MEGAWIN
Bit-0
EX0