User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 610 of 909 2019 Ambiq Micro, Inc.
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10 TMRA3IE1 0x0 RW
Counter/Timer A3 Interrupt Enable bit based on COMPR1.
DIS = 0x0 - Disable counter/timer A3 from generating an interrupt based on
COMPR1.
EN = 0x1 - Enable counter/timer A3 to generate an interrupt based on COM-
PR1.
9TMRA3IE0 0x0RW
Counter/Timer A3 Interrupt Enable bit based on COMPR0.
DIS = 0x0 - Disable counter/timer A3 from generating an interrupt based on
COMPR0.
EN = 0x1 - Enable counter/timer A3 to generate an interrupt based on COM-
PR0.
8:6 TMRA3FN 0x0 RW
Counter/Timer A3 Function Select.
SINGLECOUNT = 0x0 - Single count (output toggles and sticks). Count to
CMPR0A3, stop.
REPEATEDCOUNT = 0x1 - Repeated count (periodic 1-clock-cycle-wide
pulses). Count to CMPR0A3, restart.
PULSE_ONCE = 0x2 - Pulse once (aka one-shot). Count to CMPR0A3,
assert, count to CMPR1A3, deassert, stop.
PULSE_CONT = 0x3 - Pulse continously. Count to CMPR0A3, assert,
count to CMPR1A3, deassert, restart.
SINGLEPATTERN = 0x4 - Single pattern.
REPEATPATTERN = 0x5 - Repeated pattern.
CONTINUOUS = 0x6 - Continuous run (aka Free Run). Count continuously.
ALTPWN = 0x7 - Alternate PWM
Table 870: CTRL3 Register Bits
Bit Name Reset RW Description