XR16L788 Exar Corporation, XR16L788 Datasheet - Page 17

• Manufacturer Part Number: XR16L788
• Description: High-performance 3.3V Octal Uart
• Manufacturer: Exar Corporation

XR16L788 OCTAL UART
REV. 1.1.4
The 8 sets of UART configuration registers are de-
coded using address lines A4 to A7 as show below.
Address lines A0 to A3 select the 16 registers in each
channel.
The first 8 registers are 16550 compatible with EXAR
enhanced feature registers located on the upper 8
addresses.
4.5 UART CHANNEL CONFIGURATION REGIS-
TERS AND ADDRESS DECODING.
F
IGURE
10. I
NTERNAL
L
OOP
B
ACK
T ra n sm it S h ift
R e ce ive S h ift
R e g iste r
R e g iste r
17
R T S #
C T S #
D T R #
D S R #
R I#
C D #
M C R b it-4 = 1
A7
0
0
0
0
0
0
0
0
O P 1 #
O P 2 #
V C C
V C C
V C C
A6
0
0
0
0
1
1
1
1
A5
0
0
1
1
0
0
1
1
T X [7 :0 ]
R X [7 :0 ]
R T S # [7 :0 ]
C T S # [7 :0 ]
D T R # [7 :0 ]
D S R # [7 :0 ]
R I# [7 :0 ]
C D # [7 :0 ]
A4
0
1
0
1
0
1
0
1
UART C
S
ELECTION
0
1
2
3
4
5
6
7
HANNEL