Read-only

About the ExtTestSetIO connector

Description

Reads a 16-bit value from the external test set. The 16-bit value is comprised of lines AD0 - AD12, Sweep Holdoff In and Interrupt In (inverted).

When this command is used the analyzer does NOT generate the appropriate timing signals;  it simply reads the lines. The user needs to first use the WriteRaw method to do the initial setup. The RLW line (pin25) must be set to the appropriate level in order to read the test set connected.

Below is the format of data that is read with ReadRaw:

Pin

Bit

Signal name

22

0

AD0*

23

1

AD1*

11

2

AD2*

10

3

AD3*

9

4

AD4*

21

5

AD5*

20

6

AD6*

19

7

AD7*

6

8

AD8*

5

9

AD9*

4

10

AD10*

17

11

AD11*

3

12

AD12*

2

13

Sweep Holdoff  In

13

14

Interrupt In  (inverted internally)

na

15

Always Zero, grounded internally

*These lines are dependent on the state of RLW (pin25).
Writing a 0(low) to RLW will set lines AD0-AD12 to write mode.
Writing a 1(high) to RLW will set lines AD0-AD12 to read mode.

 VB Syntax

value = ExtIO.ReadRaw (address)

Variable

(Type) - Description

value

(variant) - Variable to store the returned data

ExtIO

(object) - An External IO object

address

(variant) - Address to read data from

Return Type

Real

Default

Not Applicable

Examples

value = ExtIO.ReadRaw (address)

C++ Syntax

HRESULT ReadRaw( VARIANT* Input );

Interface

IHWExternalTestSetIO