A6850 查看數據表（PDF） - Altera Corporation
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A6850 Datasheet PDF : 15 Pages
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Functional
Description
a6850 Asynchronous Communications Interface Adapter Data Sheet
Figure 2 shows the a6850 block diagram.
Figure 2. a6850 Block Diagram
di
8
8
e
rnw
cs 3
rs
Bus
Interface
Control
Transmitter
Data
8
Register
Control
Register
nirq
do
8
Status
Register
8
8
Receiver
Data
Register
8
Output
Shift
Register/
Parity
Generate
Transmitter
Control
Receiver
Control
Input
Shift
Register/
Parity
Check
Transmitter
txclk
txdata
ncts
ndcd
Receiver
nrts
rxdata
rxclk
Registers
The a6850 contains the following registers:
s Transmitter data register
s Receiver data register
s Control register
s Status register
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