xr16c2852ij Exar Corporation, xr16c2852ij Datasheet - Page 14

• Manufacturer Part Number: xr16c2852ij
• Description: 2.97v To 5.5v Dual Uart With 128-byte Fifos
• Manufacturer: Exar Corporation

XR16C2852
2.97V TO 5.5V DUAL UART WITH 128-BYTE FIFOS
N
F
F
OTE
IGURE
IGURE
:
Table-B selected as Trigger Table for
Receive Data
Byte and Errors
9. R
10. R
128 bytes by 11-bit
16X Clock
ECEIVER
wide FIFO
ECEIVER
16X Clock
and Errors
Data Byte
O
Receive
O
PERATION IN NON
PERATION IN
Receive Data Shift
Register (RSR)
Data FIFO
Receive
LSR bits
Figure 10 (Table 10 on page
FIFO
Receive
Tags in
Error
Data
4:2
-FIFO M
Receive Data Shift
AND
Register (RSR)
Holding Register
A
Receive Data
ODE
Data falls to 8
FIFO Trigger=16
Data fills to 24
UTO
Validation
Data Bit
(RHR)
Example:
- RX FIFO trigger level selected at 16 bytes
RTS F
14
LOW
27).
RTS# re-asserts when data falls below the flow
control trigger level to restart remote transmitter.
Enable by EFR bit-6=1, MCR bit-2.
RTS# de-asserts when data fills above the flow
control trigger level to suspend remote transmitter.
Enable by EFR bit-6=1, MCR bit-2.
Validation
(See Note Below)
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
Receive Data Characters
ODE
Receive Data Characters
RXFIFO1
xr
RXFIFO1
REV. 2.1.1