2.3.6
JP6 : User Timer/Counter Clock Input
Selection
Internal 2M
Clock
(default)
INTCLK
EXTCLK
External
Clock
INTCLK
EXTCLK
The OME-A-822PGL/PGH has 3 independent 16 bit timer/counters.
The cascaded counter1 and counter2 are used as
a pacer timer
. Counter0 can
be used as a user programmable timer/counter. The user programmable
timer/counter can be set to
2M internal clock
or
external clock ExtCLK,
CN3 pin 37
. The block diagram is given in section 2.6. The clock source must
be very
stable.
Using the 2M internal clock is strongly suggested.
The OME-A-822PGL/PGH software driver uses counter0 as a machine
independent timer. If users program calls the
A-822_Delay()
subroutine,
counter0 will be programmed as a machine independent timer. More detailed
information is provided in section 2.6.
NOTE : if you use A-822_Delay(), the JP6 jumper must
be set to internal 2M clock.
OME-A-822PGL/PGH Hardware Manual ----
14
