參數(shù)資料
型號(hào)： OR3TP12-6PS240
英文描述： Single 2.3V 10 MHZ OP, -40C to +125C, 14-SOIC 150mil, T/R
中文描述： 用戶可編程ASIC的特殊功能
文件頁(yè)數(shù)： 26/128頁(yè)
文件大?。?/td> 2450K
代理商： OR3TP12-6PS240
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ORCAOR3TP12 FPSC
Embedded Master/Target PCI Interface
Data Sheet
March 2000
26
L Lucent Technologies Inc.
Symbol
I/O
Description
Clock
Domain
Target Write Data FIFO Signals
(continued)
twlastcycn
I
Target Write Last Data Cycle.
This active-low signal has two functions:
a. Indicates that the current Target start address data on
twdata
(quad-port)
or
datatofpga
(dual-port with
fifo_sel
= 1) is the final transfer of the
address phase.
taenn
is required to be asserted to receive
twlastcycn
.
b. Indicates that the current Target write data on
twdata
(quad-port) or
datatofpga
(dual-port with
fifo_sel
= 1) is the final transfer of the data
phase. For single data transfers, it will be asserted on the only word of the
transfer, whereas on bursts, if will be asserted only on the final word.
twdataenn
is required to be asserted to receive
twlastcycn
.
Burst Write Data Control.
This active-low signal indicates to the Target con-
troller that a write transaction should not be disconnected immediately when
the Target write data FIFO is full, but allow up to eight wait-states to be
inserted. When desasserted, the Target controller will disconnect when the
write FIFOs are full. Once asserted, this signal needs to remain asserted for
a minimum of two
pciclk
cycles.
Target Read Data FIFO Signals
trdataenn
O
Target Read FIFO Data Enable.
This active-low signal enables the register-
ing of bus
trdata
(quad-port mode) or
datafmfpga
(dual-port mode) into the
Target read data FIFO.
trdataenn
should not be asserted when the Target
read data FIFO is full (
tr_fulln
= 0).
trdata[17:0]
(quad-port mode)
or
datafmfpga[31:0]
,
datafmfpgax[3:0]
(dual-port mode)
Data:
Unused:
tr_afulln
I
Target Read FIFO Almost Full.
This active-low signal indicates that the Tar-
get read data FIFO has only four more 64-bit empty locations available.
tr_fulln
I
Target Read FIFO Full.
This active-low signal indicates that the Target read
data FIFO is full and that no more data can be accepted.
trdataenn
must not
be asserted when
tr_fulln
is asserted.
trlastcycn
I
Target Read Last Data Cycle
. This active-low signal is asserted to indicate
the final cycle of the read data phase. During read bursts, more than one
clock is usually required to transfer a complete data phase; therefore, this
signal will be asserted only on the last data word. During a read burst,
trlast-
cycn
may remain inactive for longer than it is required by the external
Master, leading to transfer of excess data into the Target read data FIFO. All
excess data will be cleared when the external Master terminates the transac-
tion.
trlastcycn
will only be active only with an asserted
trdataenn
.
fclk
*
twburstpendn
O
pciclk
fclk
*
O
Depending on the OR3TP12 configuration, only one of these buses will be
available to the FPGA application. For Target operations, these buses will
carry the same information, but in different sizes as summarized below:
Target Read Data: Read data to the PCI bus.
trdata[15:0]
trdata[17:16]
datafmfpga[31:0]
datafmfpgax[3:0]
fclk
*
fclk
*
fclk
*
fclk
*
* The source of the clock (
fclk1
or
fclk2
) for the FIFO interface (Master or Target) is selected in the FPSC configuration manager.
PCI Bus Core Detailed Description
(continued)
Table 6. Embedded Core/FPGA Interface Signals
(continued)
相關(guān)PDF資料
PDF描述
OR3TP12-6PS240I Quad 2.3V 10 MHz OP, I temp, -40C to +85C, 14-SOIC 150mil, T/R
OR3TP12 Field-Programmable System Chip (FPSC) Embedded Master/Target PCI Interface
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