
MOTOROLA
MC68341 USER’S MANUAL
7- 7
7.2.9 Channel B Request-To-Send (
RTSB)
This active-low output signal is programmable as the channel B request-to-send or as a
dedicated parallel output.
RTSB
When used for this function, this signal can be programmed to be automatically negated
and asserted by either the receiver or transmitter. When connected to the CTS≈ input of
a transmitter, this signal can be used to control serial data flow.
OP1
When used for this function, this output is controlled by bit 1 in the OP.
7.2.10 Channel A Clear-To-Send (
CTSA)
This active-low input is the channel A clear-to-send.
7.2.11 Channel B Clear-To-Send (
CTSB )
This active-low input is the channel B clear-to-send.
7.2.12 Channel A Transmitter Ready (
TRDYA)
This active-low output signal is programmable as the channel A transmitter ready or as a
dedicated parallel output and cannot be masked by the IER.
T≈RDYA
When used for this function, this signal reflects the complement of the status of bit 2 of
the channel A status register (SRA). This signal can be used to control parallel data flow
by acting as an interrupt to indicate when the transmitter contains a character.
OP6
When used for this function, this output is controlled by bit 6 in the OP.
7.2.13 Channel A Receiver Ready (
RRDYA )
This active-low output signal is programmable as the channel A receiver ready, channel A
first-in-first-out (FIFO) full indicator, or a dedicated parallel output and cannot be masked
by the IER.
R≈RDYA
When used for this function, this signal reflects the complement of the status of bit 1 of
the ISR. This signal can be used to control parallel data flow by acting as an interrupt to
indicate when the receiver contains a character.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.