a16450 Universal Asynchronous Receiver/Transmitter Data Sheet
Figure 2 shows the a16450block diagram.
Functional
Description
Figure 2. a16450 Block Diagram
sin
Receiver Register
& Control
rclk
din[7..0]
a[2..0]
cs0
cs1
ncs2
Receiver Buffer
Register
Decode &
Control
Logic
nads
mr
rd
nrd
wr
Output Data
Multiplexer
dout[7..0]
Line Control
Register
nwr
ddis
csout
Divisor Register
(MSB)
Baud
Generator
nbaudout
Divisor Register
(LSB)
clk
Line Status
Register
Transmitter
Register &
Control
sout
Transmitter Holding
Register
nrts
ndtr
Modem Control
Register
nout1
nout2
ncts
ndsr
ndcd
nri
Modem
Control
Logic
Modem Status
Register
Interrupt Enable
Register
Interrupt
Control
Logic
intr
Interrupt ID
Register
68
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