mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 58

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pinout and Signal Descriptions
3.5.14 Port T
Technical Data
58
This port provides eight general-purpose I/O pins when not enabled for
input capture and output compare in the timer and pulse accumulator
subsystem. The TEN bit in the TSCR register enables the timer function.
The pulse accumulator subsystem is enabled with the PAEN bit in the
PACTL register.
Register DDRT determines pin direction of port T when used for general-
purpose I/O. When DDRT bits are set, the corresponding pin is
configured for output. On reset the DDRT bits are cleared and the
corresponding pin is configured for input.
When the PUPT bit in the TMSK2 register is set, all input pins are pulled
up internally by an active pull-up device. Pull-ups are disabled after
reset.
Setting the RDPT bit in the TMSK2 register configures all port T outputs
to have reduced drive levels. Levels are at normal drive capability after
reset. The TMSK2 register can be read or written anytime after reset
Refer to
Freescale Semiconductor, Inc.
For More Information On This Product,
Enhanced Capture
Pinout and Signal Descriptions
Go to: www.freescale.com
Timer.
MC68HC912DG128 — Rev 3.0
MOTOROLA