P82C150 데이터 시트보기 (PDF) - Philips Electronics

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P82C150

CAN Serial Linked I/O device (SLIO) with digital and analog port functions

Philips Electronics 

Philips Semiconductors

CAN Serial Linked I/O device (SLIO) with

digital and analog port functions

Preliminary specification

P82C150

7 FUNCTIONAL DESCRIPTION

7.1 I/O functions

The P82C150 provides 16 port pins (P15 to P0) which are

individually configurable via CAN-bus. Besides the digital

I/O functions some of these port pins provide analog I/O

functions.

7.1.1 DIGITAL INPUT FUNCTIONS

Input levels HIGH and LOW on the port pins (P15 to P0)

can be read in two ways by the host node:

• Polling: a Remote Frame is sent to the P82C150 to be

answered by a Data Frame containing the Data Input

Register contents.

• Event capture: in case of edge-triggered mode, the

P82C150 sends the same Data Frame caused by the

event of a rising and/or falling edge on the

corresponding port pins (see Table 3).

7.1.2 DIGITAL OUTPUT FUNCTIONS

The Data Output Register is set via a CAN message.

Its content is only output when the corresponding bits of

the Output Enable Register are set to logic 1s.

7.1.3 ANALOG INPUT/OUTPUT FUNCTIONS

• Up to six multiplexed analog input signals for

analog-to-digital conversion or general purpose

• Up to two quasi-analog output channels (DPM;

Distributed Pulse Modulation)

• Two input comparators, for example for window

comparator applications

• A separate analog-to-digital input comparator with

feedback output.

Analog-to-digital converted digital results are obtained by

reading the Analog-to-Digital Conversion (ADC) Register.

Analog functions of each port pin are individually

controlled by the Analog Configuration Register.

Writing the I/O registers is done serially via CAN-bus by

Data Frames. The first data byte contains the register

address, and the second and third data bytes represent

the register contents. If a read only register is addressed,

the contents of the second and third data bytes are

ignored.

It is recommended to set unused port pins to HIGH

(100 kΩ resistor to VDD).

handbook, halfpage

Px

DIx

P82C150

MHA068

DOx

3-state buffer

OEx

Fig.4 I/O port pins.

1996 Jun 19

8

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