C509-L_97 SIEMENS [Siemens Semiconductor Group], C509-L_97 Datasheet - Page 113

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

Bit
EXEN2
EXF2
TF2
Special Function Registers TL2/TH2
Special Function Registers CRCL/CRCH
Bit
TL2.7 - 0
TH2.7 - 0
CRCL.7 - 0
CRCH.7 - 0
Semiconductor Group
CC H
CD H
CA H
CB H
Bit No. MSB
.7
.7
.7
.7
7
Function
Timer 2 low byte
TL2 contains the 8-bit low byte of the 16-bit timer 2 count value.
Timer 2 high byte
TH2 contains the 8-bit high byte of the 16-bit timer 2 count value.
Compare/Reload/Capture register low byte
CRCL is the 8-bit low byte of the 16-bit reload register of timer 2. It is also used
for compare/capture functions.
Compare/Reload/Capture register high byte
CRCH is the 8-bit high byte of the 16-bit reload register of timer 2. It is also
used for compare/capture functions.
Symbol
Timer 2 external reload interrupt enable
If EXEN2 = 0, the timer 2 external reload interrupt is disabled.
The external reload function is not affected by EXEN2.
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.
.6
.6
.6
.6
6
.5
.5
.5
.5
5
.4
.4
.4
.4
4
(Addresses CC H /CD H )
(Addresses CA H /CB H )
6-35
.3
.3
.3
.3
3
On-Chip Peripheral Components
.2
.2
.2
.2
2
.1
.1
.1
.1
1
LSB
.0
.0
.0
.0
0
Reset Value : 00 H
Reset Value : 00 H
TL2
TH2
CRCL
CRCH
1997-10-01
C509-L