Lexmark C760, C762 manual 8-12, Fastbytes Protocol Data Transfer Sequence, Interfaces

Models: C762 C760

1 402
Download 402 pages 23.32 Kb
Page 304
Image 304
8-12

8-12 Table 8-1: Typical Parallel Interface Timings

Interfaces

Table 8-1shows all protocol timings in nanoseconds.

Table 8-1: Typical Parallel Interface Timings

Time

Name

Minimum/Maximum

A

Data setup to STROBE* low

500 min.

 

 

 

B

STROBE* width

500 min.

 

 

 

C

Data hold after STROBE*

500 min.

 

 

 

D

STROBE* low to BUSY high

500 max.

 

 

 

E

ACKNLG* low until ACKNLG* high

500 min.

 

 

 

F

ACKNLG* high to BUSY low1

G

BUSY low and ACKNLG* high to STROBE* low

500 min.

 

 

 

1 Relationship of ACKNLG* and BUSY is not consistent

Fastbytes Protocol Data Transfer Sequence

Your printer is equipped with Fastbytes protocol, which is an enhanced parallel interface protocol. Fastbytes protocol may give you a faster data transfer time on some personal computers and operating systems. Fastbytes protocol is the printer default.

If you have data transmission problems between your personal computer and the printer, change the parallel protocol to Standard. This causes the printer to operate in IEEE-compliant compatibility mode.

The following illustration shows the typical timing sequence.

DATA 1-8

STROBE*

ACK*

BUSY

Page 304
Image 304
Lexmark C760, C762 manual 8-12, Fastbytes Protocol Data Transfer Sequence, Interfaces, 1 Typical Parallel Interface Timings