![](/html/Altera/133530/page4.png)
a6402 Universal Asynchronous Receiver/Transmitter Data Sheet
Functional
Description
Figure 2 shows a block diagram of the a6402.
Figure 2. a6402 Block Diagram
crl
cls2
cls1
Control
pi
Register
epe
sbs
tbre
tre
mr
ntbrl
trc
8
tbr
Transmitter
Control
Transmitter
Buffer
Register
Transmitter
Register
Start
Parity
Generator
Transmitter
Transmitter
Multiplexer
tro
dr
oe
Receiver
mr
Control
ndrr
rrc
Stop
Receiver
rri
rbr
8
Receiver
Buffer
8 Receiver
Register
Register
8
pe
Parity
Check
fe
Stop
Check
60
Altera Corporation