IDT80KSBR201BR IDT, Integrated Device Technology Inc, IDT80KSBR201BR Datasheet - Page 3

• Manufacturer Part Number: IDT80KSBR201BR
• Description: IC FLOW CTRL SRL BUFFER 484CBGA
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT80KSBR201BR

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 80KSBR201BR

„2007 Integrated Device Technology, Inc. All rights reserved.
IDT
Notes
2.1.1 PPS Configuration 1
designated QDR SRAMs. S-Port 2 is disabled. All queues except queue 0 is disabled. Queue 0 is configured to both
receive and transmit data on S-Port 1. The PPS shall feed data into the SerB where it will be stored. Upon reaching the
appropriate waterlevel, designated by the programmed partial full flag, the SerB shall send a multicast packet back to the
PPS, and wait until the waterlevel is again exceeded to send another packet.
2.1.2 PPS Configuration 2
communicate to the PPS and the rest of the system beyond the PPS.
Queue 5 is connected between S-Port 1 and S-Port 2. Queue 1 is connected to S-Port 1 on both input and output. Queue
2 is connected with S-Port 2 as input and S-Port 1 as output. Queue 4 is connected to S-Port 2 on both input and output.
All other queues are disabled. In this configuration, the PPS or other sRIO port device may write and read data on S-Port
1. The data may be stored for later retrieval on S-Port 1, sent to S-Port 2, or sent to both places. The FPGA or other Lite
protocol device on S-Port 2 would have the same ability to send data in on S-Port 2, sending it on to S-Port 1 or holding it
for retrieval on S-Port 2, or both.
The following are items of note concerning the PPS application:
In the first configuration for the PPS, the SerB shall connect to the PPS on S-Port 1. P-Port shall connect to one of the
In some PPS applications, it may be desirable to connect an FPGA to S-Port 2 on the SerB, allowing the FPGA to
1. The SerB has the ability to act as a simple master.
2. The SerB will typically perform SWRITEs.
3. The DSPs have the ability to read the SerB through the PPS.
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Sp e e d
Sp e e d
S e ria l
S e ria l
L in e s
L in e s
H ig h
H ig h
The SerB's primary application with the PPS will be to broadcast data. It must be a master to perform a
broadcast, even if the data is requested.
The SerB has the ability to initiate writes. Mainly to prevent overflow and to perform broadcasts when
waterlevel is reached (timed event). This avoids requiring the DSP to increase congestion by requesting
data and controlling the SerB.
The target address(s) generated by the SerB is programmable.
The packets are stored in the format they come in and are broadcast with simple changes to the headers
The DSP may send a doorbell to the SerB requesting a packet in which SerB will respond with a single
packet.
The DSP may read the same data from the SerB more than once for multiple antennas. To accomplish
this, the same data must have been loaded to more than one queue on S-Port 1. Each queue may read
the same data only once, but as many as four queues may be used to hold the same data.
s R IO
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Figure 3. PPS Offload Application
Q u e u e 0
Q u e u e 1
Q u e u e 2
Q u e u e 3
Figure 4
is an example of this application. As shown,
A d d re s s
D a ta
D a ta
C N T L
In te rfa c e
E x te rn a l
M e m o ry
November 26, 2007
Product Brief