IDT72P51749L6BBI8 IDT, Integrated Device Technology Inc, IDT72P51749L6BBI8 Datasheet - Page 38

• Manufacturer Part Number: IDT72P51749L6BBI8
• Description: IC FLOW CTRL 36BIT 256-BGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT72P51749L6BBI8

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 72P51749L6BBI8

Un-MARKing a Queue
UN-MARKing a Queue in FIFO Mode
UN-MARK Operational Notes:
In FIFO Mode
Write Port
IDT72P51749/72P51759/72P51769 1.8V, MULTI-QUEUE FLOW-CONTROL DEVICES
(128 QUEUES) 36 BIT WIDE CONFIGURATION 1,179,648, 2,359,296, and 4,718,592 bits
- Un-MARKing can only occur during a Queue switch cycle.
- In FIFO Mode, UN-MARKing a Queue can be accomplished by either
- Note only 1 queue can be marked at any given time.
- In Standard/FIFO mode the MARK can NOT be moved location to
switching to the same queue or switching to another queue.
location within the queue.
Read Queue UN-MARK
Write Queue UN-MARK
1
A
1
A
Figure 22. UN-MARKing a Queue in FIFO Mode - Read Queue UN-MARK
Figure 21. UN-MARKing a Queue in FIFO Mode - Write Queue UN-MARK
RCLK
RADEN
WCLK
WADEN
RADEN
WADEN
B
0
B
0
Read Queue
Select Cycle
Write Queue
Select Cycle
A
A
Selects a Queue and UN-MARK the Queue
This rising edge of
RCLK is the start
This rising edge of
WCLK is the start
Selects a Queue and UN-MARK the Queue
of the
of the
1
1
st
st
cycle
cycle
38
Read Queue
MARK Cycle
Read Port
Write Queue
MARK Cycle
- Un-MARKing can only occur during a Queue switch cycle.
- In Standard/FIFO mode, UN-MARKing a Queue can be accomplished
- Note only 1 queue can be marked at any given time.
- In Standard/FIFO mode the MARK can NOT be moved location to
B
B
by either switching to the same queue or switching to another queue.
location within the queue.
ACTI ON
ACTI ON
COMMERCIAL AND INDUSTRIAL
6714 drw39
6714 drw38
TEMPERATURE RANGES
FEBRUARY 10, 2009