st16c554 Exar Corporation, st16c554 Datasheet - Page 31

• Manufacturer Part Number: st16c554
• Description: Quad Uart With 16-byte Fifos
• Manufacturer: Exar Corporation

REV. 4.0.1
F
F
IGURE
IGURE
A0-A7
D0-D7
R/W#
CS#
RX
INT
IOR#
RXRDY#
out of RHR)
(Reading data
16. 68 M
17. R
ECEIVE
ODE
R
(M
Start
Bit
EADY
T
OTOROLA
RWS
T
ADS
& I
D0:D7
NTERRUPT
) D
Valid Address
ATA
Stop
T
Bit
CSL
B
T
T
Valid Data
T
RR
in RHR
US
1 Byte
Ready
WDS
Active
Data
IMING
T
T
SSR
SSR
W
RITE
[N
T
ON
RWH
T
31
IMING FOR
D0:D7
-FIFO M
T
T
WDH
ADH
2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
T
CSD
ODE
C
T
RR
HANNELS
in RHR
Ready
]
1 Byte
Active
Data
T
T
FOR
SSR
SSR
C
HANNELS
A-D
Valid Address
A-D
D0:D7
Valid Data
ST16C554/554D
T
RR
in RHR
T
1 Byte
Active
Ready
SSR
Data
T
SSR
68Write
RXNFM