xr16v554 Exar Corporation, xr16v554 Datasheet - Page 17

• Manufacturer Part Number: xr16v554
• Description: 2.25v To 3.6v Quad Uart With 16-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.2
F
IGURE
R eceive D ata
Byte and Errors
10. R
16 bytes by 11-bit w ide
16X C lock
ECEIVER
FIFO
O
PERATION IN
R eceive D ata Shift
R egister (R SR )
D ata FIFO
R eceive
FIFO
R eceive
D ata
V alidation
D ata falls to
D ata fills to
D ata Bit
Trigger=8
FIFO
14
4
E xam ple
17
: - R X FIFO trigger level selected at 8 bytes
2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
Asking for sending data w hen data falls below the flow
Asking for stopping data w hen data fills above the flow
control trigger level to restart rem ote transm itter.
control trigger level to suspend rem ote transm itter.
R H R Interrupt (IS R bit-2) program m ed for
(See N ote Below )
desired FIFO trigger level.
FIFO is Enabled by F C R bit-0=1
R eceive D ata C haracters
XR16V554/554D
R X FIFO 1