XR68C192 Datasheet, PDF (3/32 Pages) Exar Corporation – DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER

Block Diagram
D 0-D 7
R /-W
-R E S E T
-D T A C K
-IA C K
A 1-A 4
-C S
-IN T
XTAL1
XTAL2
Rev. P1.10
XR68C92/192
Transm it
FIFO
R eg isters
F lo w
C o n tro l
Logic
R eceive
FIFO
R eg isters
F lo w
C o n tro l
Logic
Transm it
Shift
R eg ister
R eceive
Shift
R eg ister
TX A/B
RX A/B
I/O
C o n tro l
Logic
O P 0-O P 7
IP0-IP5
3