IDT72P51559L6BBI8 IDT, Integrated Device Technology Inc, IDT72P51559L6BBI8 Datasheet - Page 52

• Manufacturer Part Number: IDT72P51559L6BBI8
• Description: IC FLOW CTRL 36BIT 256-BGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT72P51559L6BBI8

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 72P51559L6BBI8

BUS MATCHING OPERATION
During a master reset of the multi-queue the state of the three setup pins, BM
[3:0] (Bus Matching), determine the input and output port bus widths as shown
in Table 11, “Bus Matching Set-Up”. 9 bit words, 18 bit words and 36 bit words
can be written into and read from the queues. When writing to or reading from
the multi-queue in a bus matching mode, the device orders data in a “Little
Endian” format. See Figure 36, Bus Matching Byte Arrangement for details.
reads of data widths determined by the write port width. For example, if the input
port is x36 and the output port is x9, then four data reads from a full queue will
be required to cause the full flag to go HIGH (queue not full). Conversely, the
Empty flag and Almost Empty flag operations are always based on writes and
reads of data widths determined by the read port. For example, if the input port
is x18 and the output port is x36, two write operations will be required to cause
the Empty flag (EF) of an empty queue to go HIGH (queue is not empty).
port, therefore the input bus width to all queues is equal (determined by the input
port size) and the output bus width from all queues is equal (determined by the
output port size).
IDT72P51539/72P51549/72P51559/72P51569 1.8V, MQ FLOW-CONTROL DEVICES
(32 QUEUES) 36 BIT WIDE CONFIGURATION 589, 824, 1,179,648, 2,359,296, and 4,718,592
Bus Matching operation between the input port and output port is available.
The Full flag and Almost Full flag operation is always based on writes and
Note, that the input port serves all queues within a device, as does the output
52
TABLE 11 — BUS-MATCHING SET-UP
BM3
0
0
0
0
0
0
0
0
1
BM2
0
0
0
0
1
1
1
1
0
BM1
0
0
1
1
0
1
0
1
0
COMMERCIAL AND INDUSTRIAL
BM0
0
1
0
1
1
0
0
1
1
TEMPERATURE RANGES
Write Port
x36
x36
x36
x18
x18
x18
FEBRUARY 13, 2009
x9
x9
x9
Read Port
x36
x18
x36
x18
x36
x18
x9
x9
x9