C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 210

• Manufacturer Part Number: C509-L_97
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Special Function Register IRCON0 (Address C0 H )
Bit
EXF2
TF2
IEX6
IEX5
IEX4
IEX3
IEX2
IADC
Semiconductor Group
Bit No.
C0 H
Function
Timer 2 external reload flag
Set when a reload is caused by a negative transition on pin T2EX while EXEN2 = 1.
If ET2 in IEN0 is set (timer 2 interrupt enabled), EXF2 = 1 will cause an interrupt.
Can be used as an additional external interrupt when the reload function is not
used. EXF2 must be cleared by software.
Timer 2 overflow flag
Set by a timer 2 overflow and must be cleared by software. If the timer 2 interrupt
is enabled, TF2 = 1 will cause an interrupt.
External interrupt 6 edge flag
Set by hardware when external interrupt edge was detected or when a compare
event occurred at pin 1.3/INT6/CC3. Cleared by hardware when processor vectors
to interrupt routine.
External interrupt 5 edge flag
Set by hardware when external interrupt edge was detected or when a compare
event occurred at pin 1.2/INT5/CC2. Cleared by hardware when processor vectors
to interrupt routine.
External interrupt 4 edge flag
Set by hardware when external interrupt edge was detected or when a compare
event occurred at pin 1.1/INT4/CC1. Cleared by hardware when processor vectors
to interrupt routine.
External interrupt 3 edge flag
Set by hardware when external interrupt edge was detected or when a compare
event occurred at pin 1.0/INT3/CC0. Cleared by hardware when processor vectors
to interrupt routine.
External interrupt 2 edge flag
Set by hardware when external interrupt edge was detected or when a compare
event occurred at pin 1.4/INT2/CC4. Cleared by hardware when processor vectors
to interrupt routine.
A/D converter interrupt request flag
Set by hardware at the end of a conversion. Must be cleared by software.
EXF2
MSB
C7
H
TF2
C6
H
IEX6
C5
H
IEX5
C4
H
7-14
IEX4
C3
H
IEX3
C2
H
IEX2
C1
H
IADC
LSB
Interrupt System
C0
Reset Value : 00 H
H
IRCON0
1997-10-01
C509-L