Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Manuel D’Utilisation
Codes de produits
DEMO9S12XHY256
Port Integration Module (S12XHYPIMV1)
MC9S12XHY-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
67
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, M,U, V and AD when used
as general purpose I/O
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,M, U and V on per-pin basis
R,M, 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 open-drain (wired-or) mode on Ports H, R,M and S.Control
register to enable/disable slew rate control on Port U and Port V
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 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.
shows all the pins and their functions that are controlled by the Port Integration Module.
NOTE
If there is more than one function associated with a pin, the priority is
indicated by the position in the table from top (highest priority) to bottom
(lowest priority).
indicated by the position in the table from top (highest priority) to bottom
(lowest priority).
Table 2-1. Pin Functions and Priorities
Port
Pin Name
Pin Function
& Priority
1
I/O
Description
Pin Function
after Reset
-
BKGD
MODC
2
I
MODC input during RESET
BKGD
BKGD
I/O BDM communication pin