參數(shù)資料
型號(hào)： IDT72V51446L6BB8
廠商： IDT, Integrated Device Technology Inc
文件頁(yè)數(shù)： 43/57頁(yè)
文件大?。?/td> 0K
描述： IC FLOW CTRL MULTI QUEUE 256-BGA
標(biāo)準(zhǔn)包裝： 1,000
類型： 多隊(duì)列流量控制
安裝類型： 表面貼裝
封裝/外殼： 256-BBGA
供應(yīng)商設(shè)備封裝： 256-BGA（17x17）
包裝： 帶卷 (TR)
其它名稱： 72V51446L6BB8
48
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
IDT72V51436/72V51446/72V51456 3.3V, MULTI-QUEUE FLOW-CONTROL DEVICES
(16 QUEUES) 36 BIT WIDE CONFIGURATION 589,824, 1,179,648 and 2,359,296 bits
WCLK
Dn
Prev
PAEn
RCLK
ESTR
RDADD
D5 Sect 2
101 xxxx1
100 00100
D5Q4
tAH
tAS
tAH
tAS
1
tSKEW3
Previous value loaded on to PAE bus
xxxx xxx0
D5 Sect 2
2
RADEN
tQH
tQS
tSTH
tSTS
tPAE
5935 drw31
Device 5
PAE
tRAE
*AA*
*BB*
*CC*
*DD*
*FF*
*EE*
tRAE
D5 Qn Status
xxxx xxx0
D5 Sect 2
Bus
PAEn
Previous value loaded on to PAE bus
D5 Sect 2
tPAEHZ
tPAEZL
xxxx xxx1
REN
tENH
tENS
Device 5 -Qn
Wy
D5 Q4
Wy+1
D5 Q4
Wy+3
D5 Q4
Wy+2
D5 Q4
Wa+1
D5 Qn
tA
Wa
D5 Qn
tDH
tDS
WEN
WADEN
FSTR
tAH
100 0100
tAS
WRADD
D5Q4
D3Q8
Wn
D5 Q4
Wn+1
D5Q4
Wx
D3 Q8
011 01000
D4 Sect 1
100 xxx0
*A*
*B*
*C*
*D*
*E*
*F*
tQH
tQS
tQH
tQS
tAH
tAS
tAH
tAS
tENS
tENH
tSTH
tSTS
Device 5
PAEn
1
2
tENS
tENH
Wp+1
Wp
Writes to Previous Q
tDH
tDS
tRAE
D5 Q4
status
Figure 28.
PAEn - Direct Mode, Flag Operation
Cycle:
*A*
Queue 4 of Device 5 is selected for write operations.
Word, Wp is written into the previously selected queue.
*AA* Queue 4 of Device 5 is selected for read operations.
A sector from another device has control of the
PAEn bus.
The discrete
PAE output of device 5 is currently in High-Impedance and the PAE active flag is controlled by the previously selected device.
*B*
Word Wp+1 is written into the previously selected queue.
*BB* Word, Wa+1 is read from Qn of D5, due to FWFT operation.
*C*
Word, Wn is written into the newly selected queue, Q4 of D5. This write will cause the
PAE flag on the read port to go from LOW to HIGH (not almost empty) after time,
tSKEW3 + RCLK + tRAE (if tSKEW3 is violated one extra RCLK cycle will be added.
*CC* Word, Wy from the newly selected queue, Q4 will be read out due to FWFT operation.
Sector 2 of Device 5 is selected on the
PAEn bus. Q4 of device 5 will therefore have is PAE status output on PAE[0]. There is a single RCLK cycle latency before
the
PAEn bus changes to the new selection.
*D*
Queue 8 of Device 3 is selected for write operations.
Word Wn+1 is written into Q4 of D5.
*DD* The
PAEn bus changes control to D5, the PAEn outputs of D5 go to Low-Impedance and sector 2 is placed onto the outputs. The device of the previously selected
sector now places its
PAEn outputs into High-Impedance to prevent bus contention. Word, Wy+1 is read from Q4 of D5.
The discrete
PAE flag will go HIGH to show that Q4 of D5 is not almost empty. Q4 of device 5 will have its PAE status output on PAE[0].
*E*
No writes occur.
*EE* Word, Wy+2 is read from Q4 of D5.
*F*
Sector 1 of device 4 is selected on the write port for the
PAFn bus.
Word, Wx is written into Q8 of D3.
*FF* The
PAEn bus updates to show that Q4 of D5 is almost empty based on the reading out of word, Wy+1.
The discrete
PAE flag goes LOW to show that Q4 of D5 is almost empty based on the reading of Wy+1.
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