xr16c872iq Exar Corporation, xr16c872iq Datasheet - Page 52

• Manufacturer Part Number: xr16c872iq
• Description: Dual Uart With 1284 Parallel Port And Plug-and-play Controller
• Manufacturer: Exar Corporation

XR16C872
Rev. 1.00
RX Data
fills RX
F I F O
INT
I O R #
INT
I O R #
R X
~4 Characters
Receive Data Timing in FIFO and DMA Mode 1
Delay
Receive Data Timing in DMA Mode 0
S T A R T
BIT
Receive Data
Time-Out INT
D
0
DISCONTINUED
D
1
5 D A T A B I T S
RX FIFO fills to
Trigger Level
D
2
DATA BITS (5-8)
6 D A T A B I T S
1 6 B A U D R A T E C L O C K
7 D A T A B I T S
52
D
3
Unload RX
FIFO Data
D
4
D
5
Receive Data
Ready INT
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D
6
D
7
P A R I T Y
BIT
S T O P
BIT
T 1 6 D
S T A R T
T 1 5 D
N E X T
D A T A
BIT
X R 8 7 2 R F I F O
Active
XR872RX