Rev. 1.0, 02/00, page 279 of 1141
Section 14 Timer L
14.1
Overview
Timer A is an 8-bit up/down counter using the control pulses or the CFG division signals as the
clock source.
14.1.1
Features
Features of timer L are as follows:
•
Two types of internal clocks (
φ
/128 and
φ
/64), DVCFG2 (CFG division signal 2), PB and
REC-CTL (control pulses) are available for your selection.
—
When the PB-CTL is not available, such as when reproducing un-recorded tapes, tape
count can be made by the DVCFG2.
—
Selection of the leading edge or the trailing edge is workable with the CTL pulse counting.
•
Interrupts occur when the counter overflows or underflows and at occurrences of compare
match clear.
•
Capable to switch over between the up-counting and down-counting functions with the
counter.