SAB80C515A-5 Datasheet, PDF (80/108 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller Family

SAB 80C515A/83C515A-5
Capture
This feature permits saving of the actual timer/counter contents into a selected register upon
an external event or a software write operation. Two modes are provided to latch the current
16-bit value of timer 2 registers TL2 and TH2 into a dedicated capture register.
Mode 0: Capture is performed in response to a transition at the corresponding
port 1 pins CC0 to CC3.
Mode 1: Write operation into the low-order byte of the dedicated capture
register causes the timer 2 contents to be latched into this register.
Compare
In compare mode, the 16-bit values stored in the dedicated compare registers are compared
to the contents of the timer 2 registers. If the count value in the timer 2 registers matches one
of the stored values, an appropriate output signal is generated and an interrupt is requested.
Two compare modes are provided:
Mode 0: Upon a match the output signal changes from low to high. It goes
back to low level when timer 2 overflows.
Mode 1: The transition of the output signal can be determined by software.
A timer 2 overflow causes no output change.
Semiconductor Group
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