mc68hc05pl4b Freescale Semiconductor, Inc, mc68hc05pl4b Datasheet - Page 61

• Manufacturer Part Number: mc68hc05pl4b
• Description: Low-cost Single-chip Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

9.7
9.8
MC68HC05PL4
REV 2.0
16-BIT TIMER OPERATION DURING WAIT MODE
During WAIT mode the 16-bit timer continues to operate normally and may gener-
ate an interrupt to trigger the MCU out of the WAIT mode.
16-BIT TIMER OPERATION DURING STOP MODE
When the MCU enters the STOP mode the free-running counter stops counting
(the internal processor clock is stopped). It remains at that particular count value
until the STOP mode is exited by applying a low signal to the IRQ pin, at which
time the counter resumes from its stopped value as if nothing had happened. If
STOP mode is exited via an external reset (logic low applied to the RESET pin)
the counter is forced to timer interrupt vector.
If a valid input capture edge occurs at the PA2/TCAP pin during the STOP mode
the input capture detect circuitry will be armed. This action does not set any ags
or “wake up” the MCU, but when the MCU does “wake up” there will be an active
input capture ag (and data) from the rst v alid edge. If the STOP mode is exited
by an external reset, no input capture ag or data will be present e ven if a valid
input capture edge was detected during the STOP mode.
Freescale Semiconductor, Inc.
For More Information On This Product,
16-BIT PROGRAMMABLE TIMER
Go to: www.freescale.com
April 30, 1998
GENERAL RELEASE SPECIFICATION
9-11