MC68306FC16 Datasheet, PDF (114/191 Pages) Motorola, Inc – Integrated EC000 Processor

6.2.6 Channel B Receiver Serial Data Input (RxDB)
This signal is the receiver serial data input for channel B. Data on this signal is sampled
on the rising edge of the clock source, with the least significant bit received first.
6.2.7 Channel A Request-To-Send (RTSA/OP0)
This active-low output signal is programmable as the channel A request-to-send or as a
dedicated parallel output.
6.2.7.1 RTSA . 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 clear-to-send (CTS≈ ) input of a transmitter, this signal can be used to control serial
data flow.
6.2.7.2 OP0. When used for this function, this output is controlled by bit 0 in the output
port data register (DUOP).
6.2.8 Channel B Request-To-Send (RTSB/OP1)
This active-low output signal is programmable as the channel B request-to-send or as a
dedicated parallel output.
6.2.8.1 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.
6.2.8.2 OP1. When used for this function, this output is controlled by bit 1 in the DUOP
register.
6.2.9 Channel A Clear-To-Send (CTSA/IP0)
This active-low input is programmable as the channel A clear-to-send or as a dedicated
parallel input. It can generate an interrupt on change-of-state.
6.2.9.1 CTSA. When used for this function, this signal is the channel A clear-to-send input.
6.2.9.2 IP0. When used for this function, this signal is a general-purpose input.
6.2.10 Channel B Clear-To-Send (CTSB/ IP1)
This active-low input is programmable as the channel B clear-to-send or as a dedicated
parallel input. It can generate an interrupt on change-of-state.
6.2.10.1 CTSB. When used for this function, this signal is the channel B clear-to-send
input.
6.2.10.2 IP1. When used for this function, this signal is a general-purpose input.
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