Overview - Samsung S3F80P5X User Manual

S3F80P5_UM_ REV1.00
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OVERVIEW

The S3F80P5 microcontroller has a 16-bit timer/counter called Timer 2 (T2). For universal remote controller
applications, timer 2 can be used to generate the envelope pattern for the remote controller signal. Timer 2 has
the following components:
•
One control register, T2CON (E8H, Set 1, Bank1, R/W)
•
Two 8-bit counter registers, T2CNTH and T2CNTL (E4H and E5H, Set1, Bank1, Read only)
•
Two 8-bit reference data registers, T2DATAH and T2DATAL (E6H and E7H, Set 1, Bank1, R/W)
•
One 16-bit comparator
You can select one of the following clock sources as the timer 2 clock:
•
Oscillator frequency (f
•
Internal clock input from the counter A module (counter A flip/flop output)
You can use Timer 2 in three ways:
•
As a normal free run counter, generating a timer 2 overflow interrupt (IRQ3, vector F0H) at programmed time
intervals.
•
To generate a timer 2 match interrupt (IRQ3, vector F2H) when the 16-bit timer 2 count value matches the
16-bit value written to the reference data registers.
•
To generate a timer 2 capture interrupt (IRQ3, vector F2H) when a triggering condition exists at the P3.0 (You
can select a rising edge, a falling edge, or both edges as the trigger).
In the S3F80P5 interrupt structure, the timer 2 overflow interrupt has higher priority than the timer 2 match or
capture interrupt.
TIMER 2
) divided by 4, 8, or 16
OSC
The CPU clock should be faster than timer 2 clock.
NOTE
TIMER 2
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