CD1284 Datasheet, PDF (72/176 Pages) Intel Corporation – IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports

CD1284 — IEEE 1284-Compatible Parallel Interface Controller
Figure 10. CD1284 Transmit Character Processing (Continued)
D
E
CHAR
N _TRANSLATION
ENABLED
?
Y
PERFORM CR, NL
PROCESSING AS
SPECIFIED
SEND CHAR
EXIT
5.9
Baud Rate Generation
The CD1284 provides a separate baud rate generator both directions of each channel. Each receive
and transmit baud rate generator can be driven from one of five available clock sources. The source
being used is selected by the value in the R/TCOR. The selected clock is divided by the value in the
R/TBPR to yield the desired bit rate.
Note: R/T is used as a register abbreviation indicating Receive / Transmit followed by the register
acronym.
The five clock sources are:
Clk0
Clk1
Clk2
Clk3
Clk4
System clock ÷ 8, R/TCOR = 0
System clock ÷ 32, R/TCOR = 1
System clock ÷ 128, R/TCOR = 2
System clock ÷ 512, R/TCOR = 3
System clock ÷ 2048,
72
Datasheet