IA82527-PLC44A-R datasheet(13/45 Pages) INNOVASIC

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IA82527

04 May 2007

CAN Serial Communications Controller

As of Production Ver. 00

PRELIMINARY



 2007

EN21070504-00

www.Innovasic.com

Customer Support:

Page 13 of 45

1-888-824-4184

Table 3. IA82527 Pin/Signal Descriptions, continued

Signal

Name

PLCC

QFP

Description

miso

ready/miso

master in slave out. Output (open drain). Serial Interface Mode.

When the IA82527 is configured to operate with a serial interface,

miso is the serial data output.

mode0

—

mode1

—

modeN (N = 1 or 0). Input.

The logic levels at the mode0 and mode1 inputs determine the

operating mode (i.e., interface type) of the IA82527 as follows:

mode1

mode0

Interface Type

8-bit Multiplexed Intel

16-bit Multiplexed Intel

8-bit Multiplexed Non-Intel

8-bit Non-Multiplexed Non-Intel

The mode1 and mode0 inputs are also used to establish the Serial

Interface Mode as follows: when the IA82527 is reset, if

•

mode1 = 0

•

mode0 = 0

•

rd_n = 0

•

wr_n = 0

the Serial Interface Mode will be selected.

The mode1 and mode0 pins are internally connected to weak pull-

downs. These pins will be pulled low during reset if unconnected.

Following reset, these pins will float.

mosi

a4/ad4/mosi

master out slave in. Input. Serial Interface Mode.

When the IA82527 is configured to operate with a serial interface,

mosi is the serial data input.

continued

. . .

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