xr17c152im Exar Corporation, xr17c152im Datasheet - Page 57

• Manufacturer Part Number: xr17c152im
• Description: 5v Pci Bus Dual Uart
• Manufacturer: Exar Corporation

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REV. 1.2.0
F
F
IGURE
IGURE
Transmit Trigger Level
RX Data Ready Interrupt at
22. T
23. R
Receive Trigger Level
TX Interrupt at
RX Data Input
TX Data
RANSMIT
ECEIVE
D
D
ATA
ATA
R
START
I
EADY
START
NTERRUPT AT
BIT
BIT
I
D0
NTERRUPT AT
Trigger Level
Set at Below
D0
D1
D1
5 DATA BITS
BAUD RATE CLOCK of 16X or 8X
T
RIGGER
6 DATA BITS
D2
7 DATA BITS
DATA BITS (5-8)
DATA BITS (5-8)
D2
below trigger level
T
De-asserted at
RIGGER
L
D3
EVEL
D3
57
D4
L
D4
EVEL
D5
D5
Trigger Level
Clear at
Above
D6
D6
D7
D7
PARITY
PARITY
BIT
BIT
5V PCI BUS DUAL UART
STOP
STOP
BIT
BIT
First byte that
above trigger
reaches the
trigger level
Asserted at
START
NEXT
DATA
level
BIT
TXNOFIFO-1
RXFIFO1
XR17C152