ST16C454 Datasheet, PDF (8/30 Pages) Exar Corporation – QUAD UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART)

ST16C454/68C454
SYMBOL DESCRIPTION
Symbol
RX A-B
RX C-D
TX A-B
TX C-D
Pin
7,29
41,63
17,19
51,53
Signal
type
Pin Description
will be set to a logic 1. This pin has no effect on the UART’s transmit
or receive operation.
I
Receive Data Input RX A-D. - These inputs are associated with
individual serial channel data to the ST16C454. The RX signal will
be a logic 1 during reset, idle (no data), or when the transmitter is
disabled. During the local loop-back mode, the RX input pin is
disabled and TX data is internally connected to the UART RX Input,
internally.
O
Transmit Data - These outputs are associated with individual serial
transmit channel data from the 454. The TX signal will be a logic
1 during reset, idle (no data), or when the transmitter is disabled.
During the local loop-back mode, the TX input pin is disabled and
TX data is internally connected to the UART RX Input.
Rev. 3.20
8