In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:

If you are using the SX48 you can use one of the 16-bit counters. 
Otherwise an interrupt is probably the easiest.

'--------------------------------
OutPin  PIN RA.0 OUTPUT
counter VAR Byte

INTERRUPT 20000 ' 20000 = 50uSec
  INC counter
  IF counter = 40 THEN
    OutPin = 1
    counter = 0
  ELSE
    OutPin = 0
  ENDIF
RETURNINT
' ----------------------

or with the SX48 

'-----------------------
OutPin PIN RB.6 OUTPUT ' Must use pin RB.6 for Timer1 output

TIMER1 PRESCALE, 1 ' 1:2 Prescale (timer counts @ 25Mhz)
TIMER1 PWM, 1250, 50000
'-----------------------

Bean.

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