XR16L580 Exar Corporation, XR16L580 Datasheet - Page 13

• Manufacturer Part Number: XR16L580
• Description: Smallest 2.25 to 5.5V Uart With 16-Byte Fifo And Power-save
• Manufacturer: Exar Corporation

áç
áç
áç
áç
REV. 1.2.0
F
F
IGURE
IGURE
Receive Data
Byte and Errors
9. R
10. R
16 bytes by 11-bit
16X Clock
ECEIVER
ECEIVER
wide
FIFO
16X Clock
and Errors
Data Byte
O
Receive
O
PERATION IN NON
PERATION IN
Receive Data Shift
Register (RSR)
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
Data FIFO
Receive
LSR bits
Receive
FIFO
Tags in
Error
Data
4:2
-FIFO M
AND
Receive Data Shift
Register (RSR)
Holding Register
A
Receive Data
ODE
UTO
Validation
FIFO Trigger=8
Data falls to
Data Bit
Data fills to
(RHR)
RX FIFO trigger level selected at 8 bytes
Example
14
RTS F
4
13
:
LOW
RTS# re-asserts when data falls below the flow
control trigger level to restart remote transmitter.
Enable by EFR bit-6=1, MCR bit-1.
RTS# de-asserts when data fills above the flow
control trigger level to suspend remote transmitter.
Enable by EFR bit-6=1, MCR bit-1.
Validation
Data Bit
RHR Interrupt (ISR bit-2) programmed for
desired FIFO trigger level.
FIFO is Enabled by FCR bit-0=1
C
ONTROL
RHR Interrupt (ISR bit-2)
M
ODE
Receive Data Characters
Receive Data Characters
RXFIFO1
XR16L580
RXFIFO1