Parallel Interface Timing; Rs-232 Serial Interface - Genicom 5050 User Manual

Parallel Interface Timing

DATA
nSTROBE
nACK
BUSY
Legend Description
A Data Setup
B nStrobe width
C Data Hold
D nAck width
E Busy delay
F Busy duration
Since the (synchronous) Busy duration is a function of nStrobe, the maximum rate of data
exchange depends on the host's nStrobe width. The measured rate is 122 KB/sec for a one-
thousand-character burst using a 1.5 microsecond nStrobe.

RS-232 Serial Interface

5050/5100 User's Manual
B
C
A
E
Microseconds
0 minumum
0.1 minumum
0 minimum
0.68
0.2
nStrobe width + 0.9 typical
This interface supports baud rates from 1200 to 38,400. A 38, 400
baud rate corresponds to 3840 characters per second assuming a
ten-bit character frame. A 1000-lpm printer can render about 2200
characters per second printing resident characters in a high-speed
text mode. Under such circumstances, a baud rate slower than
38,400 will not enable the rated speed of the printer. During one-bit-
per-dot operation, graphics transfers such as used by ANSI,
Proprinter, and Epson emulations, the bytes required to descibe a
line of print can increase by a factor of five or more.
The serial input buffer is 32K bytes. The high trip point is adjustable
from the Set Up Menu in 1% increments. The default is 80%. Any
filters that have been enabled that are associated with this port
represent 16K bytes of additional buffer capacity per filter.
D
F
195
Appendix H. Interface, Emulation and Filter Information