參數(shù)資料
型號: OR3TP12
英文描述: Field-Programmable System Chip (FPSC) Embedded Master/Target PCI Interface
中文描述: 現(xiàn)場可編程系統(tǒng)芯片(促進(jìn)文化基金)嵌入式主/目標(biāo)PCI接口
文件頁數(shù): 70/128頁
文件大小: 2450K
代理商: OR3TP12
ORCAOR3TP12 FPSC
Embedded Master/Target PCI Interface
Data Sheet
March 2000
70
L Lucent Technologies Inc.
PCI Bus Core Target Controller Detailed Description
(continued)
Example: Target Read I/O, Nondelayed Transaction
Figure 25, shows the timing on the PCI bus for a Target I/O read that is handled as nondelayed transaction
(
deltrn
= 1,
trburstpendn
= 0); that is, the operation waits on the PCI bus while the FPGA application is notified via
the Target FIFO Interface. The Target accepts the transaction without issuing an immediate retry, but inserts wait-
states (up to 16 or 32) until the requested data in placed in the Target read FIFO. If the FPGA application cannot
fetch the data within the initial/subsequent latency time, the Target issues a retry. The Target terminates the I/O
read request by disconnecting with data on the first word transformed, thus disallowing bursting.
The FPGA interface timing is as shown in Figure 27 and Figure 28 for dual- and quad-port respectively. The FPGA
interface timing is similar for all Target reads and is described below in the Single Target Read FIFO Interface sec-
tion.
5-7546(F)
Figure 25. Target I/O Read, Nondelayed (PCI Bus, 32-Bit)
T0
T1
T2
T3
Tn0
Tn1
Tn2
Tn3
X
ADDRESS
X
X
DATA
X
X
CMD: I/O RD
BYTE ENABLES
BYTE ENABLES
X
CLK
FRAME#
AD[31:0]
C/BE[3:0]#
irdyn#
DEVSEL#
TRDY#
STOP#
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