IDT72V51433L6BB IDT, Integrated Device Technology Inc, IDT72V51433L6BB Datasheet - Page 39

• Manufacturer Part Number: IDT72V51433L6BB
• Description: IC FLOW CTRL MULTI QUEUE 256-BGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT72V51433L6BB

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 72V51433L6BB

NOTE:
1. The waveform here shows the PAE flag operation when no queue switches are occurring and a queue selected on both the write and read ports is being written to then read
Cycle:
*A* Queue 12 of Device 1 is selected on the read port. A queue within Device 2 had previously been selected. The PAE flag output and the data outputs of device 1 are High-Impedance.
*B* No read occurs.
*C* The PAE flag output now switches to device 1. Word, Wn is read from Q12 due to the FWFT operation. This read operation from Q12 is at the almost empty boundary, therefore
*D* Q15 of device 1 is selected.
*E* The PAE flag goes LOW due to the read from Q12 2 RCLK cycles earlier. Word Wn+1 is read out due to the FWFT operation.
*F* Word, W0 is read from Q15 due to the FWFT operation. The PAE flag goes HIGH to show that Q15 is not almost empty.
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
WCLK
PAE
(Device 1)
PAE
(Device 2)
RCLK
WEN
RDADD
RADEN
from at the almost empty boundary.
Flag Latencies:
Assertion: 2*RCLK + t
De-assertion: t
If t
REN
PAE
RCLK
PAE will go LOW 2 RCLK cycles later.
SKEW2
REN
Qout
is violated there will be one extra RCLK cycle.
HIGH
HIGH-Z
HIGH-Z
SKEW2
t
t
CLKH
AS
t
QS
+ RCLK + t
D
RAE
t
ENS
*A*
1
n+1 words in Queue
Q
t
CLKL
12
t
QH
RAE
t
AH
t
ENH
t
SKEW2
*B*
Figure 20. Almost Empty Flag Timing and Queue Switch
t
RAE
t
OLZ
Figure 21. Almost Empty Flag Timing
*C*
t
A
t
AEHZ
t
AELZ
t
t
AS
QS
HIGH-Z
D
39
1
*D*
Q
15
D
t
ENS
1
t
QH
Q
t
AH
12
W
n+2 words in Queue
n
*E*
t
ENH
t
A
t
RAE
D
1
Q
12
1
W
*F*
COMMERCIAL AND INDUSTRIAL
n+1
t
A
t
RAE
TEMPERATURE RANGES
D
t
RAE
1
Q
15
*G*
2
W
0
t
n+1 words in Queue
A
D
1
Q
5939 drw22
15
5939 drw23
W
1