P82C150AHT datasheet(8/36 Pages) PHILIPS

8 / 36 page

1996 Jun 19

Philips Semiconductors

Preliminary speciﬁcation

CAN Serial Linked I/O device (SLIO) with

digital and analog port functions

P82C150

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

• 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 k

Ω resistor to VDD).

Fig.4 I/O port pins.

handbook, halfpage

MHA068

DIx

DOx

OEx

3-state buffer

P82C150

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