IDT88P8342BHGI IDT, Integrated Device Technology Inc, IDT88P8342BHGI Datasheet - Page 35
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IDT88P8342BHGI
Manufacturer Part Number
IDT88P8342BHGI
Description
IC SPI3-SPI4 EXCHANGE 820-PBGA
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.IDT88P8342BHGI.pdf
(98 pages)
Specifications of IDT88P8342BHGI
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
88P8342BHGI
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4.4.2 Microprocessor insert to SPI-3 egress
datapath
microprocessor data insert interface to a SPI-3 egress port.
the device.
microprocessor interface. The data available bit is set. Data is stored along with
its LP address, LID (including SPI-3 choice), error information, SOP, and EOP.
IDT88P8342 SPI EXCHANGE 2 x SPI-3 TO SPI-4
The diagram below shows the datapath through the device from the
The following is a description of the path taken by a fragment of data through
Data and control information are written to the insert buffer through the
Min: 19.44MHz
Max: 133MHz
8 bit / 32 bit
2 x SPI-3
Figure 25. Microprocessor interface to SPI-3 egress detailed datapath diagram
t+1
t
t+258
SOP
7
JTAG
LID Counters Memory
Figure 24 . Microprocessor data insert buffer
data[255]
data[2]
data[1]
data[0]
length
flags
lid
uproc
EA
SPI-3 /
LID map
Memory
Main
ED
A
35
PAR EOP
Data is stored in LID-allocated buffer segments. The Table 80, SPI-3 egress
port descriptor table (64 entries) is consulted and the PFP decides to move the
data to the SPI-3 egress port. The SPI-3 packet fragment processor chooses
the next LP. The choice of LP is dependent on the status of the LP and the
availability of a complete fragment. Data is moved to a SPI-3 egress buffer along
with its LP address. SPI-3 LP address, error information, SOP, and EOP.
interface.
Chip Counters Memory
Data is transmitted in packet fragments over the selected SPI-3 egress
0
t+1
t
t+258
SPI-4 /
LID map
EA
ED
PAR
address parity error
data parity error
packet error
6371 drw16
not used
INDUSTRIAL TEMPERATURE RANGE
6371 drw28
Max:400 MHz
Min: 80 MHz
SPI-4.2
APRIL 10, 2006
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