30
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V51433/72V51443/72V51453 3.3V, MULTI-QUEUE FLOW-CONTROL DEVICES
(16 QUEUES) 18 BIT WIDE CONFIGURATION 589,824, 1,179,648 and 2,359,296 bits
DFM
MRS
SENI SENO
MQ1
WCLK
Serial Enable
(can be tied LOW)
WCLK
Default Mode
DFM = 1
Master Reset
Serial Loading
Complete
DFM
MRS
SENI SENO
MQ2
WCLK
DFM
MRS
SENI SENO
MQn
WCLK
RCLK
WEN
FF
WADEN/
FSTR
RADEN/
ESTR
OV
5939 drw11a
tWFF
tENS
tROV
tPCWQ
tQS
tQH
tQS
tQH
tPCRQ
HIGH - Z
HIGH - Z
(Slave Device)
(Slave Device)
SENO
(MQ1)
tSENO
SENO
(MQ2)
SENO
(MQ8)
tSENO
WCLK
MRS
1st Device in Chain
1st
2nd
nth
3rd
2nd Device in Chain
1st
2nd
nth
Final Device in Chain
1st
2nd
nth
Programming
Complete
tSENO
Serial Port Connection for Default Programming
SI SO XSI SOXSI SOX
Figure 8. Default Programming
NOTES:
1. This diagram illustrates multiple devices connected in expansion.
The SENO of the final device in a chain is the "programming complete" signal.
2. SENI of the first device in the chain can be held LOW
3. The SENO of a device should connect to the SENI of the next device in the chain.
The final device SENO is used to indicate programming complete.
4. When Default Programming is complete the SENO of the final device will go LOW.
5. SCLK is not used and can be tied LOW.
6. Programming of all devices must be complete (SENO of the final device is LOW),
before any write or read port operations can take place, this includes queue selections.