Using the EVFU

3.Data bit 5 must be 0 (not set).

OR:

1.The PI line must be disabled or low;

2.Bits 7 and 6 must be 0 (not set); and

3.Data bit 5 must be 1 (set).

Given these conditions, the lower four bits of a byte specify the EVFU channel number. Table 25 lists the EVFU channels and their equivalent data bytes when the PI line is enabled; Table 26 lists the EVFU channel and their equivalent data bytes when the PI line is disabled.

Table 25. EVFU Codes ā€” PI Line Enabled

 

 

 

ASCII

 

 

 

 

Data Bits

 

 

 

Channel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hex

Dec

Code

8*

7

6

5

4

3

2

1

 

 

00

0

NUL

1

X

X

0

0

0

0

0

1 (TOF)

 

01

1

SOH

1

X

X

0

0

0

0

1

2

 

02

2

STX

1

X

X

0

0

0

1

0

3

 

03

3

ETX

1

X

X

0

0

0

1

1

4

 

04

4

EOT

1

X

X

0

0

1

0

0

5

 

05

5

ENQ

1

X

X

0

0

1

0

1

6

 

06

6

ACK

1

X

X

0

0

1

1

0

7

 

07

7

BEL

1

X

X

0

0

1

1

1

8

 

08

8

BS

1

X

X 0 1 0 0 0

9

 

09

9

HT

1

X

X 0 1 0 0 1

10

 

 

0A

10

LF

1

X

X

0

1

0

1

0

11

 

 

0B

11

VT

1

X

X

0

1

0

1

1

12 (VT)

 

 

0C

12

FF

1

X

X

0

1

1

0

0

13

 

 

0D

13

CR

1

X

X

0

1

1

0

1

14

 

 

0E

14

SO

1

0

0

0

1

1

1

0

15

 

 

0F

15

SI

1

0

0

0

1

1

1

1

16

 

 

6E

110

n

1

1

1

0

1

1

1

0

Start Load

 

 

6F

111

o

1

1

1

0

1

1

1

1

End Load

 

 

 

 

 

 

 

 

 

 

 

 

 

X = Undefined, 0 or 1

 

 

1 = High

 

 

 

 

0 = Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note *The ASCII values in Table 25 assume that all undefined bits are set to 0. When the PI line is enabled, data bit 8 is the PI line on a serial interface, and data bit 8 is undefined on a parallel interface.

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Printronix LQH-HWTM manual Using the Evfu, Evfu Codes PI Line Enabled, Data Bits Channel Hex Dec Code