MC68HC912D60 Motorola, MC68HC912D60 Datasheet - Page 255

• Manufacturer Part Number: MC68HC912D60
• Description: Microcontrollers
• Manufacturer: Motorola

PORTT — Timer Port Data Register
MC68HC912D60A — Rev 3.0
MOTOROLA
RESET:
TIMER
PORT
I/OC7
BIT 7
PT7
NOTE:
0
I/OC6
PT6
6
0
Since the Output Compare 7 shares the pin with Pulse Accumulator
input, the only way for Pulse accumulator to receive an independent
input from Output Compare 7 is setting both OM7 & OL7 to be zero, and
also OC7M7 in OC7M register to be zero.
OC7 is still able to reset the counter if enabled while PT7 is used as input
to Pulse Accumulator.
PORTT can be read anytime. When configured as an input, a read will
return the pin level. When configured as an output, a read will return the
latched output data.
Writes do not change pin state when the pin is configured for timer
output. The minimum pulse width for pulse accumulator input should
always be greater than the width of two module clocks due to input
synchronizer circuitry. The minimum pulse width for the input capture
should always be greater than the width of two module clocks due to
input synchronizer circuitry.
Read: any time (inputs return pin level; outputs return data register
contents)
Write: data stored in an internal latch (drives pins only if configured for
output)
Freescale Semiconductor, Inc.
For More Information On This Product,
I/OC5
PT5
5
0
Go to: www.freescale.com
Enhanced Capture Timer
I/OC4
PT4
4
0
I/OC3
PT3
3
0
I/OC2
PT2
2
0
I/OC1
PT1
1
0
Enhanced Capture Timer
I/OC0
BIT 0
PT0
0
Timer Registers
Technical Data
$00AE
255