ST16C654D Exar Corporation, ST16C654D Datasheet - Page 45

• Manufacturer Part Number: ST16C654D
• Description: St16c654d -quad Uart With 64-byte Fifo And Infrared Irda Encoder/decoder
• Manufacturer: Exar Corporation

xr
REV. 5.0.2
F
IGURE
(Unloading)
(Loading data
*INT cleared when the ISR is read or when TX FIFO fills up to trigger level.
into FIFO)
TX
INT*
TXRDY#
IOW#
25. T
RANSMIT
enabled
IER[1]
Start
Bit
S
R
D0:D7
EADY
ISR Read
Stop
Bit
T
S
& I
D0:D7
NTERRUPT
TX FIFO fills up
to trigger level
T
T
IMING
D0:D7
[FIFO M
S
TX FIFO
45
Full
D0:D7
T
WRI
2.97V TO 5.5V QUAD UART WITH 64-BYTE FIFO
ODE
T
T
, DMA M
SRT
S
D0:D7
ODE
T
WT
T
E
S
NABLED
D0:D7
below trigger level
TX FIFO drops
T
T
SI
]
empty location
FOR
At least 1
in FIFO
ISR Read
C
S
ST16C654/654D
Last Data Byte
HANNELS
Transmitted
D0:D7
TXDMA
T
A-D