IA16450 Datasheet, PDF (2/10 Pages) InnovASIC, Inc – Universal Asynchronous Receiver/Transmitter

IA16450
Page 2 of 10
Preliminary Data Sheet
Universal Asynchronous Receiver/Transmitter
The IA16450 is a form, fit and function compatible part to the National NS16450 Univeral
Asynchronous Receiver/Transmitter. The IA16450 function receives and transmits data in a variety
of configurations including 5, 6, 7 or 8 bit data words, odd, even or no parity, and 1, 1.5, and 2 stop
bits. This megafunction includes an internal Baud Rate Generator and Interrupt Control. A block
diagram is shown in Figure 1.
Functional Block Diagram
Figure 1
INTERNAL DATA
BUS
D7:D0
DATA BUS
BUFFER
RECEIVER
BUFFER
REGISTER
RECEIVER
SIN
SHIFT
REGISTER
A0
A1
A2
CS0
CS1
CS2_n
ADS_n
MR
RD
RD_n
WR
WR_n
DDIS
CSOUT
XIN
XOUT
DECODE
AND
CONTROL
LOGIC
LINE CONTROL
REGISTER
DIVISOR LATCH
(LSB)
DIVISOR LATCH
(MSB)
LINE STATUS
REGISTER
TRANSMITTER
HOLDING
REGISTER
MODEM
CONTROL
REGISTER
MODEM STATUS
REGISTER
INTERRUPT
ENABLE
REGISTER
INTERRUPT ID
REGISTER
RECEIVER
TIMING
&
CONTROL
RCLK
BAUD
GENERATOR
BAUDOUT_n
TRANSMITTER
TIMING
&
CONTROL
TRANSMITTER
SHIFT
REGISTER
SOUT
MODEM
CONTROL
LOGIC
RTS_n
CTS_n
DTR_n
DSR_n
DCD_n
RI
OUT1_n
OUT2_n
INTERRUPT
CONTROL
LOGIC
INTR
Copyright © 1999, InnovASIC Inc.
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