Freescale Semiconductor, Inc.
Pin Descriptions
2.13.6 Port F
Port F is an 8-bit general-purpose I/O port with a data register (PORTF)
and a data direction register (DDRF). In single chip mode, port F pins are
general-purpose I/O pins (PF[7:0]). In expanded mode, port F pins act
as the low-order address lines (A[7:0]) of the address bus.
PORTF can be read at any time: inputs return the pin level; outputs
return the pin driver input level. If PORTF is written, the data is stored in
internal latches. The pins are driven only if they are configured as
outputs in single chip or bootstrap mode.
Port F pins include on-chip pull-up devices that can be enabled or
disabled.
For further information, refer to Parallel Input/Output.
2.13.7 Port G
In normal modes, Port G is an 8-bit general-purpose I/O port with a data
register (PORTG) and a data direction register (DDRG). Port G bit 7 is
the R/W line in expanded mode; the remaining bits are always general
purpose I/O.
PORTG can be read at any time: inputs return the pin level; outputs
return the pin driver input level. If PORTG is written, the data is stored in
internal latches.The pins are driven only if they are configured as outputs
in single chip or bootstrap mode. For further information, refer to Parallel
Input/Output.
Port G pins include on-chip pull-up devices that can be enabled or
disabled.
2.13.8 Port H
Port H is an 8-bit general-purpose I/O port with a data register (PORTH)
and a data direction register (DDRH). Port H pins support either
input/output, SCI2 (bits [7:6]), SCI3 (bits [5:4]), or pulse-width
Technical Data
MC68HC11P2 — Rev 1.0
Pin Descriptions
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