WARP20 datasheet(5/28 Pages) STMICROELECTRONICS

5 / 28 page

DS.

Data Strobe (Output, default active High): The

strobe pin enables the user to utilize the output.

When this pin is High it indicates that a new output

variable has been calculated and it is ready on the

output bus (O0-O7). This signal synchronizes the

external devices and in particular the interfaces

with the controlled processes (On-Line mode).

ERR.

Error (Output, active Low): When this pin is

active, W.A.R.P.2.0 has incurred in an internal error

condition.

OC0-OC1.

Output Counter (Output): This 2 bit

output bus provides the output variables with a

progressive number during the On-Line phase. As

a consequence it is possible to know to which

variable correspond the data that are on the output

data bus (O0-O7). The dimension of OC bus is

connected with the maximum number of output

variables (4).

O0-O11.

Output Bus

(Output): In the Off-Line

phase these pins provide the addresses (12 bit) for

its internal memories and send those addresses to

the external memory support where data to load are

located. These addresses sent on O0-O11 bus

allow to identify the data that have to be loaded in

W.A.R.P.2.0 internal memories.

In the On-Line phase O0-O7 carrie out the outpu t

values. When the DS is High, one output variable

can be read by external devices. The resolution

of output variables is 256 points (8 bit). If there is

more than one output, the output variables are

calculated one by one and they are provided in

the sequence stabilized during the editing phase

(see FUZZYSTUDIO

™ 2.0 User Manual).

In On-Line mode O8-O10 provide the progressive

number of the next variable to be acquired. These

pins can be used to select the next input to provide

on I0-I7 bus.

Still in on-line mode O11 allows to provide a preset-

table signal which can be used as Start-Conversion

for an A/D converter after (about 400 ns) OFL or

BUSY fall.

5/28

W.A.R.P.2.0

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