C541U_99 Datasheet, PDF (138/192 Pages) Siemens Semiconductor Group – 8-BIT CMOS MICROCONTROLLER

Interrupt System
C541U
Special Function Registers IEN1 (Address A9H)
Special Function Registers SCIEN (Address ACH)
Bit No. MSB
7
6
5
4
3
A9H
–
–
–
–
–
Reset Value : XXXXX000B
Reset Value : XXXXXX00B
2
EUDI
1
EUEI
LSB
0
ESSC
IEN1
ACH
–
–
–
–
–
– WCEN TCEN SCIEN
Bit
–
EUDI
EUEI
ESSC
WCEN
TCEN
Function
Not implemented. Reserved for future use.
Enable USB device interrupt enable
If EUDI = 0, the general USB device interrupt is disabled.
If EUDI = 1, the general USB device interrupt is enabled.
Enablel USB endpoint interrupt
If EUEI = 0, the general USB endpoint interrupt is disabled.
If EUEI = 1, the general USB endpoint interrupt is enabled.
SSC general interrupt enable
If ESSC = 0, the SSC general interrupt is disabled.
If ESSC = 1, the SSC general interrupt is enabled.
SSC write collision interrupt enable
If WCEN = 0, the SSC write collision interrupt is disabled.
If WCEN = 1, the SSC write collison interrupt is enabled. Additionally, bit
ESSC must be set if the SSC write collision interrupt should be generated.
SSC transfer completed interrupt enable
If TCEN = 0, the SSC transfer completed interrupt is disabled.
If TCEN = 1, the SSC transfer completed interrupt is enabled. Additionally, bit
ESSC must be set if the SSC transfer completed interrupt should be
generated.
Semiconductor Group
7-5
1997-10-01