XC164S Datasheet, PDF (14/72 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core

XC164S
Derivatives
General Device Information
Table 2
Pin Definitions and Functions (cont’d)
Symbo Pin Input Function
l
Num. Outp.
P4
IO
Port 4 is an 8-bit bidirectional I/O port. Each pin can be
programmed for input (output driver in high-impedance
state) or output (configurable as push/pull or open drain
driver). The input threshold of Port 4 is selectable (standard
or special).
Port 4 can be used to output the segment address lines, the
optional chip select lines, and for serial interface lines:
P4.0 53
O
A16
Least Significant Segment Address Line,
O
CS3
Chip Select 3 Output
P4.1 54
O
A17
Segment Address Line,
O
CS2
Chip Select 2 Output
P4.2 55
O
A18
Segment Address Line,
O
CS1
Chip Select 1 Output
P4.3 56
O
A19
Segment Address Line,
O
CS0
Chip Select 0 Output
P4.4 57
O
A20
Segment Address Line,
I
P4.5 58
O
EX5IN
A21
Fast External Interrupt 5 Input (alternate pin B)
Segment Address Line,
I
P4.6 59
O
EX4IN
A22
Fast External Interrupt 4 Input (alternate pin B)
Segment Address Line,
I
P4.7 60
O
EX5IN
A23
Fast External Interrupt 5 Input (alternate pin A)
Most Significant Segment Address Line,
I
EX4IN Fast External Interrupt 4 Input (alternate pin A)
Data Sheet
10
V1.0, 2005-01