General Purpose Timer Module (GPT)
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor
23-3
23.4
Low-Power Mode Operation
This subsection describes the operation of the general purpose time module in low-power modes and
halted mode of operation. Low-power modes are described in
shows the general purpose timer module operation in the low-power modes, and shows how
this module may facilitate exit from each mode.
Table 23-1. Watchdog Module Operation in Low-power Modes
General purpose timer operation stops in stop mode. When stop mode is exited, the general purpose timer
continues to operate in its pre-stop mode state.
23.5
Signal Description
provides an overview of the signal properties.
23.5.1
GPT[2:0]
The GPT[2:0] pins are for channel 2–0 input capture and output compare functions. These pins are
available for general-purpose input/output (I/O) when not configured for timer functions.
23.5.2
GPT3
The GPT3 pin is for channel 3 input capture and output compare functions or for the pulse accumulator
input. This pin is available for general-purpose I/O when not configured for timer functions.
23.6
Memory Map and Registers
shows the memory map of the GPT module. The base address for GPT is
0x1A_0000.
Low-power Mode
Watchdog Operation
Mode Exit
Wait
Normal
No
Doze
Normal
No
Stop
Stopped
No
Halted
Normal
No
Table 23-2. Signal Properties
Pin
Name
GPTPORT
Register Bit
Function
Reset State
Pull-up
GPT0
PORTTn0
GPT channel 0 IC/OC pin
Input
Active
GPT1
PORTTn1
GPT channel 1 IC/OC pin
Input
Active
GPT2
PORTTn2
GPT channel 2 IC/OC pin
Input
Active
GPT3
PORTTn3
GPT channel 3 IC/OC or PA pin
Input
Active
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
