MC9S12HY64 Datasheet, PDF (54/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Port Integration Module (S12HYPIMV1)
Most I/O pins can be configured by register bits to select data direction and drive strength, to enable and
select pull-up or pull-down devices. Port U/V have register bits to select the slew rate control.
NOTE
This document assumes the availability of all features (100-pin package
option). Some functions are not available on lower pin count package
options. Refer to the pin-out summary section.
2.1.2 Features
The Port Integration Module includes these distinctive registers:
• Data registers and data direction registers for Ports A, B, H, T, S, P, R, U, V and AD when used as
general purpose I/O
• Control registers to enable/disable pull devices and select pull-ups/pull-downs on Ports H, T, S, P,
R, U and V on per-pin basis
• Control registers to enable/disable pull-up devices on Port AD on per-pin basis
• Single control register to enable/disable pull-down on Ports A and B, on per-port basis and
• Single control register to enable/disable pull-up on BKGD pin
• Control registers to enable/disable reduced output drive on Ports H, T, S, P, R, U, V and AD on
per-pin basis
• Single control register to enable/disable reduced output drive on Ports A and B on per-port basis
• Control registers to enable/disable open-drain (wired-or) mode on Ports H, R and S. Control
register to enable/disable slew rate control on Port U and Port V
• Interrupt flag register for pin interrupts on Ports R, Port S, Port T and AD
• Control register to configure IRQ/XIRQ pin operation
• Routing register to support module port relocation
• Free-running clock outputs
A standard port pin has the following minimum features:
• Input/output selection
• 5V output drive with two selectable drive strengths
• 5V digital and analog input
• Input with selectable pull-up or pull-down device
Optional features supported on dedicated pins:
• Open drain for wired-or connections
• Interrupt inputs with glitch filtering
• The output slew rate control
2.2 External Signal Description
This section lists and describes the signals that do connect off-chip.
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
54
Freescale Semiconductor