C515C_9711 Datasheet, PDF (194/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

Interrupt System
C515C
The IEN2 and the SCIEN registers contain enable/disable flags of the SSC interrupt, the CAN
controller interrupt, and the external interrupts 7 and 8.
Special Function Register IEN2 (Address 9AH)
Special Function Register SCIEN (Address ACH)
MSB
Bit No. 7
6
5
4
3
9AH
–
– EX8 EX7 –
Reset Value : XX00X00XB
Reset Value : XXXXXX00B
LSB
2
1
0
ESSC ECAN –
IEN2
ACH
–
–
–
–
–
– WCEN TCEN SCIEN
Bit
–
EX7
EX8
ESSC
ECAN
WCEN
TCEN
Function
Reserved bits for future use.
External interrupt 7 enable
If EX7 = 0, external interrupt 7 is disabled.
If EX7 = 1, external interrupt 7 is enabled.
External interrupt 8 enable
If EX8 = 0, external interrupt 8 is disabled.
If EX8 = 1, external interrupt 8 is enabled.
SSC general interrupt enable
If ESSC = 0, the SSC general interrupt is disabled.
If ESSC = 1, the SSC general interrupt is enabled.
CAN controller interrupt enable
If ECAN = 0, the CAN controller interrupt is disabled.
If ECAN = 1, the CAN controller 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
7-7
1997-11-01