C505_9708 SIEMENS [Siemens Semiconductor Group], C505_9708 Datasheet - Page 90
C505_9708
Manufacturer Part Number
C505_9708
Description
8-Bit CMOS Microcontroller
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.C505_9708.pdf
(227 pages)
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Special Function Register IEN0 (Address A8 H )
Special Function Register IEN1 (Address B8 H )
Special Function Register IRCON (Address C0 H )
Bit
ET2
EXEN2
EXF2
TF2
Semiconductor Group
Bit No.
Bit No.
Bit No.
C0 H
A8 H
B8 H
Function
Timer 2 overflow / external reload interrupt enable.
If ET2 = 0, the timer 2 interrupt is disabled.
If ET2 = 1, the timer 2 interrupt is enabled.
Timer 2 external reload interrupt enable
If EXEN2 = 0, the timer 2 external reload interrupt is disabled.
If EXEN2 = 1, the timer 2 external reload interrupt is enabled. The external reload
function is not affected by EXEN2.
Timer 2 external reload flag
EXF2 is set when a reload is caused by a falling edge on pin T2EX while EXEN2 =
1. If ET2 in IEN0 is set (timer 2 interrupt enabled), EXF2 = 1 will cause an interrupt.
EXF2 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.
EXEN2 SWDT
EXF2
MSB
EAL
AF
C7
BF
H
H
H
The shaded bits are not used in timer/counter 2 interrupt control.
WDT
TF2
AE
BE
C6
H
H
H
IEX6
ET2
EX6
AD
C5
BD
H
H
H
IEX5
EX5
ES
AC
C4
BC
H
H
H
6-28
IEX4
ET1
EX4
AB
C3
BB
On-Chip Peripheral Components
H
H
H
IEX3
EX1
EX3
AA
BA
C2
H
H
H
ECAN EADC
SWI
ET0
A9
C1
B9
H
H
H
IADC
LSB
EX0
A8
C0
B8
Reset Value : 00 H
Reset Value : 00 H
Reset Value : 00 H
H
H
H
C505 / C505C
IEN0
IRCON
IEN1
1997-08-01
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