XC164LM_07 datasheet(39/61 Pages) INFINEON

39 / 61 page

XC164LM

Derivatives

Functional Description

Data Sheet

V1.2, 2007-03

3.12

Parallel Ports

The XC164LM provides up to 47 I/O lines which are organized into three input/output

ports and one input port. All port lines are bit-addressable, and all input/output lines are

individually (bit-wise) programmable as inputs or outputs via direction registers. The I/O

ports are true bidirectional ports which are switched to high impedance state when

configured as inputs. The output drivers of some I/O ports can be configured (pin by pin)

for push/pull operation or open-drain operation via control registers. During the internal

reset, all port pins are configured as inputs.

The edge characteristics (shape) and driver characteristics (output current) of the port

drivers can be selected via registers POCONx.

The input threshold of some ports is selectable (TTL or CMOS like), where the special

CMOS like input threshold reduces noise sensitivity due to the input hysteresis. The

input threshold may be selected individually for each byte of the respective ports.

All port lines have programmable alternate input or output functions associated with

them. All port lines that are not used for these alternate functions may be used as general

purpose IO lines.

Table 7

Summary of the XC164LM’s Parallel Ports

Port

Control

Alternate Functions

PORT1

Pad drivers

Capture inputs or compare outputs,

Serial interface lines

Port 3

Pad drivers,

Open drain,

Input threshold

Timer control signals, serial interface lines,

System clock output CLKOUT (or FOUT)

Port 5

–

Timer control signals

Port 9

Pad drivers,

Open drain,

Input threshold

Capture inputs or compare outputs

XC164LM Scheda tecnica(PDF) 39 Page - Infineon Technologies AG

XC164LM Scheda tecnica(HTML) 39 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

Scheda tecnica Scarica

Link URL