xr16v2752il Exar Corporation, xr16v2752il Datasheet - Page 16
xr16v2752il
Manufacturer Part Number
xr16v2752il
Description
High Performance Duart With 64-byte Fifo
Manufacturer
Exar Corporation
Datasheet
1.XR16V2752IL.pdf
(51 pages)
- Current page: 16 of 51
- Download datasheet (2Mb)
XR16V2752
HIGH PERFORMANCE DUART WITH 64-BYTE FIFO
F
IGURE
The local UART (UARTA) starts data transfer by asserting RTSA# (1). RTSA# is normally connected to CTSB# (2) of
remote UART (UARTB). CTSB# allows its transmitter to send data (3). TXB data arrives and fills UARTA receive FIFO
(4). When RXA data fills up to its receive FIFO trigger level, UARTA activates its RXA data ready interrupt (5) and con-
tinues to receive and put data into its FIFO. If interrupt service latency is long and data is not being unloaded, UARTA
monitors its receive data fill level to match the upper threshold of RTS delay and de-assert RTSA# (6). CTSB# follows
(7) and request UARTB transmitter to suspend data transfer. UARTB stops or finishes sending the data bits in its trans-
mit shift register (8). When receive FIFO data in UARTA is unloaded to match the lower threshold of RTS delay (9),
UARTA re-asserts RTSA# (10), CTSB# recognizes the change (11) and restarts its transmitter and data flow again until
next receive FIFO trigger (12). This same event applies to the reverse direction when UARTA sends data to UARTB
with RTSB# and CTSA# controlling the data flow.
10. A
UTO
(RXA FIFO
CTSB#
RXA FIFO
Interrupt)
RTSA#
TXB
INTA
Trigger Reached
RTS
Receiver FIFO
Trigger Level
Local UART
Transmitter
Auto CTS
Auto RTS
UARTA
Monitor
AND
Data Starts
Receive
Data
CTS F
Assert RTS# to Begin
1
2
Transmission
Trigger Level
3
4
LOW
RX FIFO
RTSA#
TXA
CTSA#
RXA
ON
C
ON
ONTROL
5
O
7
Threshold
RTS High
PERATION
16
6
8
OFF
Suspend
OFF
RTSB#
CTSB#
RTS Low
Threshold
RXB
TXB
Restart
9
10
11
Trigger Reached
Remote UART
ON
Trigger Level
Receiver FIFO
12
Auto CTS
Transmitter
Auto RTS
UARTB
Monitor
ON
Trigger Level
RX FIFO
RTSCTS1
REV. 1.0.2
Related parts for xr16v2752il
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
BiCMOS Fixed, Quad, Voltage Output, Single or Dual Supply 8-Bit Digital-to-Analog Converter
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
Voltage-Controlled Oscillator
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
INTEGRATED LINE TRANSMITTER
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
Monolithic Function Generator
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
CMOS Microprocessor Compatible Double-Buffered 12-Bit Digital-to-Analog Converter
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
CMOS 6 BIT HIGH SPEED ANALOG TO DIGITAL CONVERTER
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
8-Channel, Voltage Output 10 MHz Input Bandwidth 8-Bit Multiplying DACs with Serial Digital Data Por
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
15 V CMOS Multiplying10-Bit Digital-to-Analog Converter
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
Monolithic Function Generator
Manufacturer:
Exar Corporation
Datasheet:
Part Number:
Description:
CMOS, 6-Bit High-Speed Analog-to-digital Converter
Manufacturer:
Exar Corporation
Datasheet: