IDT72V51556L7-5BB8 IDT, Integrated Device Technology Inc, IDT72V51556L7-5BB8 Datasheet - Page 7
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IDT72V51556L7-5BB8
Manufacturer Part Number
IDT72V51556L7-5BB8
Description
IC FLOW CTRL MULTI QUEUE 256-BGA
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.IDT72V51546L7-5BB8.pdf
(58 pages)
Specifications of IDT72V51556L7-5BB8
Configuration
Dual
Density
2Mb
Access Time (max)
4ns
Word Size
36b
Sync/async
Synchronous
Expandable
Yes
Bus Direction
Uni-Directional
Package Type
BGA
Clock Freq (max)
133MHz
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3.15V
Operating Supply Voltage (max)
3.6V
Supply Current
100mA
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
256
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
72V51556L7-5BB8
PIN DESCRIPTIONS
IDT72V51546/72V51556 3.3V, MULTI-QUEUE FLOW-CONTROL DEVICES
(32 QUEUES) 36 BIT WIDE CONFIGURATION 1,179,648 and 2,359,296 bits
BM
(L14)
D[35:0]
Din
(See Pin No.
table for details)
DF
(L3)
DFM
(L2)
ESTR
(R15)
ESYNC
(R16)
EXI
(T16)
EXO
(T15)
FF
(P8)
FM
(K16)
Symbol &
(1)
Pin No.
(1)
(1)
Bus Matching
Data Input Bus
Default Flag
Default Mode
PAEn Flag Bus
Strobe
PAEn Bus Sync
PAEn Bus
Expansion In
PAEn Bus
Expansion Out
Full Flag
Flag Mode
Name
I/O TYPE
OUTPUT during Polled operation of the PAEn bus. During Polled operation each quadrant of queue status flags is
OUTPUT PAEn bus operation has been selected . EXO of device ‘N’ connects directly to EXI of device ‘N+1’. This
OUTPUT for write operations, (selected via WCLK, WRADD bus and WADEN). On the WCLK cycle after a queue
LVTTL
INPUT
LVTTL
INPUT
LVTTL
INPUT
LVTTL
INPUT
LVTTL
INPUT
LVTTL
LVTTL
INPUT
LVTTL
LVTTL
LVTTL
INPUT
please see packet ready functional discussion for more detail. Due to bus matching not all inputs may be
FM pin during Master Reset will determine whether the PAFn and PAEn flag busses operate in either
This pin is setup before Master Reset and must not toggle during any device operation. This pin is used
along with IW and OW to setup the multi-queue flow-control device bus width. Please refer to Table 3
for details.
These are the 36 data input pins. Data is written into the device via these input pins on the rising edge
of WCLK provided that WEN is LOW. Note, that in Packet mode D32-D35 may be used as packet markers,
used, any unused inputs should be tied LOW.
If the user requires default programming of the multi-queue device, this pin must be setup before Master
Reset and must not toggle during any device operation. The state of this input at master reset determines
the value of the PAE/PAF flag offsets. If DF is LOW the value is 8, if DF is HIGH the value is 128.
The multi-queue device requires programming after master reset. The user can do this serially via the
serial port, or the user can use the default method. If DFM is LOW at master reset then serial mode will be
selected, if HIGH then default mode is selected.
If direct operation of the PAEn bus has been selected, the ESTR input is used in conjunction with RCLK
and the RDADD bus to select a quadrant of queues to be placed on to the PAEn bus outputs. A quadrant
addressed via the RDADD bus is selected on the rising edge of RCLK provided that ESTR is HIGH. If
Polled operations has been selected, ESTR should be tied inactive, LOW. Note, that a PAEn flag bus
selection cannot be made, (ESTR must NOT go active) until programming of the part has been completed
and SENO has gone LOW.
ESYNC is an output from the multi-queue device that provides a synchronizing pulse for the PAEn bus
loaded on to the PAEn bus outputs sequentially based on RCLK. The first RCLK rising edge loads
quadrant 1 on to PAEn, the second RCLK rising edge loads quadrant 2 and so on. The fifth RCLK rising
edge will again load quadrant 1. During the RCLK cycle that quadrant 1 of a selected device is placed
on to the PAEn bus, the ESYNC output will be HIGH. For all other quadrants of that device, the ESYNC
output will be LOW.
The EXI input is used when multi-queue devices are connected in expansion mode and Polled PAEn
bus operation has been selected. EXI of device ‘N’ connects directly to EXO of device ‘N-1’. The EXI
receives a token from the previous device in a chain. In single device mode the EXI input must be tied
LOW if the PAEn bus is operated in direct mode. If the PAEn bus is operated in polled mode the EXI input
must be connected to the EXO output of the same device. In expansion mode the EXI of the first device
should be tied LOW, when direct mode is selected.
EXO is an output that is used when multi-queue devices are connected in expansion mode and Polled
pin pulses when device N has placed its final (4th) quadrant on to the PAEn bus with respect to RCLK.
This pulse (token) is then passed on to the next device in the chain ‘N+1’ and on the next RCLK rising
edge the first quadrant of device N+1 will be loaded on to the PAEn bus. This continues through the chain
and EXO of the last device is then looped back to EXI of the first device. The ESYNC output of each device
in the chain provides synchronization to the user of this looping event.
This pin provides the full flag output for the active queue, that is, the queue selected on the input port
selection, this flag will show the status of the newly selected queue. Data can be written to this queue
on the next cycle provided FF is HIGH. This flag has High-Impedance capability, this is important during
expansion of devices, when the FF flag output of up to 8 devices may be connected together on a common
line. The device with a queue selected takes control of the FF bus, all other devices place their FF output
into High-Impedance. When a queue selection is made on the write port this output will switch from
High-Impedance control on the next WCLK cycle. This flag is synchronized to WCLK.
This pin is setup before a master reset and must not toggle during any device operation. The state of the
Polled or Direct mode. If this pin is HIGH the mode is Polled, if LOW then it will be Direct.
7
Description
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES