XC2287 / XC2286 / XC2285
XC2000 Family Derivatives
Preliminary
Functional Description
3.15
Parallel Ports
The XC228x provides up to 118 I/O lines which are organized into 11 input/output ports
and 2 input ports. All port lines are bit-addressable, and all input/output lines can be
individually (bit-wise) configured via port control registers. This configuration selects the
direction (input/output), push/pull or open-drain operation, activation of pull devices, and
edge characteristics (shape) and driver characteristics (output current) of the port
drivers. The I/O ports are true bidirectional ports which are switched to high impedance
state when configured as inputs. During the internal reset, all port pins are configured as
inputs without pull devices active.
All port lines have programmable alternate input or output functions associated with
them. These alternate functions can be assigned to various port pins to support the
optimal utilization for a given application. For this reason, certain functions appear
several times in Table 7.
All port lines that are not used for these alternate functions may be used as general
purpose I/O lines.
Table 7
Summary of the XC228x’s Parallel Ports
Port
Width
Alternate Functions
Port 0
8
Address lines,
Serial interface lines of USIC1, CAN0, and CAN1,
Input/Output lines for CCU61
Port 1
Port 2
8
Address lines,
Serial interface lines of USIC1 and USIC2,
Input/Output lines for CCU62,
OCDS control, interrupts
13
Address and/or data lines, bus control,
Serial interface lines of USIC0, CAN0, and CAN1,
Input/Output lines for CCU60, CCU63, and CAPCOM2,
Timer control signals,
JTAG, interrupts, system clock output
Port 3
Port 4
8
8
Bus arbitration signals,
Serial interface lines of USIC0, USIC2, CAN3, and CAN4
Chip select signals,
Serial interface lines of CAN2,
Input/Output lines for CAPCOM2,
Timer control signals
Data Sheet
66
V0.91, 2007-02
Draft Version
INFINEON [ Infineon ]
