C541U_99 Datasheet, PDF (141/192 Pages) Siemens Semiconductor Group – 8-BIT CMOS MICROCONTROLLER

Interrupt System
C541U
Special Function Registers EPIEn, n=0-4 (Address C3H)
Reset Value : 00H
Bit No. MSB
LSB
7
6
5
4
3
2
1
0
C3H AIEn NAIEn RLEIEn – DNRIEn NODIEn EODIEn SODIEn EPIEn
For accessing EPIEn, SFR EPSEL must be 0nH.
Bit
AIEn
NAIEn
RLEIEn
–
DNRIEn
NODIEn
EODIEn
SODIEn
Function
USB acknowledge interrupt enable
If AIEn=0, the USB acknowledge interrupt is disabled.
If AIEn=1, the USB acknowledge interrupt is enabled.
USB not acknowledged interrupt enable
If NAIEn=0, the USB not acknowledged interrupt is disabled.
If NAIEn=1, the USB not acknowledged interrupt is enabled.
USB read length error interrupt enable
If RLEIEn=0, the USB read length error interrupt is disabled.
If RLEIEn=1, the USB read length error interrupt is enabled.
Reserved bit for future use.
USB data not ready interrupt enable
If DNRIEn=0, the USB data not ready interrupt is disabled.
If DNRIEn=1, the USB data not ready interrupt is enabled.
USB nodata interrupt enable
If NODIEn=0, the USB no data interrupt is disabled.
If NODIEn=1, the USB no data interrupt is enabled.
USB end of data interrupt enable
If EODIEn=0, the USB end of data interrupt is disabled.
If EODIEn=1, the USB end of data interrupt is enabled.
USB start of data interrupt enable
If SODIEn=0, the USB start of data interrupt is disabled.
If SODIEn=1, the USB start of data interrupt is enabled.
Semiconductor Group
7-8
1997-10-01