XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 454
XC908AS60ACFU
Manufacturer Part Number
XC908AS60ACFU
Description
MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
Manufacturer
Motorola Semiconductor Products
Datasheet
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Timer Interface Module A (TIMA)
25.5 Interrupts
Technical Data
454
(TASC0) controls and monitors the PWM signal from the linked
channels. MS0B takes priority over MS0A.
Setting MS2B links channels 2 and 3 and configures them for buffered
PWM operation. The TIMA channel 2 registers (TACH2H–TACH2L)
initially control the buffered PWM output. TIMA status control register 2
(TASC2) controls and monitors the PWM signal from the linked
channels. MS2B takes priority over MS2A.
Setting MS4B links channels 4 and 5 and configures them for buffered
PWM operation. The TIMA channel 4 registers (TACH4H–TACH4L)
initially control the buffered PWM output. TIMA status control register 4
(TASC4) controls and monitors the PWM signal from the linked
channels. MS4B takes priority over MS4A.
Clearing the toggle-on-overflow bit, TOVx, inhibits output toggles on
TIMA overflows. Subsequent output compares try to force the output to
a state it is already in and have no effect. The result is a 0% duty cycle
output.
Setting the channel x maximum duty cycle bit (CHxMAX) and setting the
TOVx bit generates a 100% duty cycle output (see
Status and Control Registers
The following TIMA sources can generate interrupt requests:
•
•
TIMA overflow flag (TOF) — The TOF bit is set when the TIMA
counter reaches the modulo value programmed in the TIMA
counter modulo registers. The TIMA overflow interrupt enable bit,
TOIE, enables TIMA overflow CPU interrupt requests. TOF and
TOIE are in the TIMA status and control register.
TIMA channel flags (CH5F–CH0F) — The CHxF bit is set when an
input capture or output compare occurs on channel x. Channel x
TIMA CPU interrupt requests are controlled by the channel x
interrupt enable bit, CHxIE.
Timer Interface Module A (TIMA)
on page 462).
MC68HC908AZ60A — Rev 2.0
TIMA Channel
MOTOROLA
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