2-52 Revision 4 Read Next Operation The Read Next operation is a feature by which the next block relative to the block " />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� M1AFS250-PQG208
寤犲晢锛� Microsemi SoC
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 300/334闋�(y猫)
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC FPGA 2MB FLASH 250K 208-PQFP
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 24
绯诲垪锛� Fusion®
RAM 浣嶇附瑷�(j矛)锛� 36864
杓稿叆/杓稿嚭鏁�(sh霉)锛� 93
闁€(m茅n)鏁�(sh霉)锛� 250000
闆绘簮闆诲锛� 1.425 V ~ 1.575 V
瀹夎椤�(l猫i)鍨嬶細 琛ㄩ潰璨艰
宸ヤ綔婧害锛� 0°C ~ 85°C
灏佽/澶栨锛� 208-BFQFP
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 208-PQFP锛�28x28锛�
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Device Architecture
2-52
Revision 4
Read Next Operation
The Read Next operation is a feature by which the next block relative to the block in the Block Buffer is
read from the FB Array while performing reads from the Block Buffer. The goal is to minimize wait states
during consecutive sequential Read operations.
The Read Next operation is performed in a predetermined manner because it does look-ahead reads.
The general look-ahead function is as follows:
Within a page, the next block fetched will be the next in linear address.
When reading the last data block of a page, it will fetch the first block of the next page.
When reading spare pages, it will read the first block of the next sector's spare page.
Reads of the last sector will wrap around to sector 0.
Reads of Auxiliary blocks will read the next linear page's Auxiliary block.
When an address on the ADDR input does not agree with the predetermined look-ahead address, there
is a time penalty for this access. The FB will be busy finishing the current look-ahead read before it can
start the next read. The worst case is a total of nine BUSY cycles before data is delivered.
The Non-Pipe Mode and Pipe Mode waveforms for Read Next operations are illustrated in Figure 2-40
Figure 2-40 Read Next Waveform (Non-Pipe Mode, 32-bit access)
Figure 2-41 Read Next WaveForm (Pipe Mode, 32-bit access)
CLK
REN
READNEXT
ADDR[17:0]
DATAWIDTH[1:0]
BUSY
STATUS[1:0]
RD[31:0]
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
0
S0S1S2
S4
S5S6
S8
S9
0D0
D1
D2
S3
D3
0
S7
D7
0
D4
D5
D6
D8
D9
CLK
REN
READNEXT
ADDR[17:0]
BUSY
STATUS[1:0]
RD[31:0]
A0
A1
A2
A3
A4
A5
A6
A7
A8
S0
S1
S2
S4
S5
S6
0D0
D1
D2
S3
D3
0
0D4
D5
D6
S7
0
D7
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M1AFS250-PQG208I 鍔熻兘鎻忚堪:IC FPGA 2MB FLASH 250K 208-PQFP RoHS:鏄� 椤�(l猫i)鍒�:闆嗘垚闆昏矾 (IC) >> 宓屽叆寮� - FPGA锛堢従(xi脿n)鍫�(ch菐ng)鍙法绋嬮杸(m茅n)闄e垪锛� 绯诲垪:Fusion® 妯�(bi膩o)婧�(zh菙n)鍖呰:40 绯诲垪:SX-A LAB/CLB鏁�(sh霉):6036 閭忚集鍏冧欢/鍠厓鏁�(sh霉):- RAM 浣嶇附瑷�(j矛):- 杓稿叆/杓稿嚭鏁�(sh霉):360 闁€(m茅n)鏁�(sh霉):108000 闆绘簮闆诲:2.25 V ~ 5.25 V 瀹夎椤�(l猫i)鍨�:琛ㄩ潰璨艰 宸ヤ綔婧害:0°C ~ 70°C 灏佽/澶栨:484-BGA 渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁�:484-FPBGA锛�27X27锛�
M1AFS250-PQG256ES 鍒堕€犲晢:ACTEL 鍒堕€犲晢鍏ㄧū:Actel Corporation 鍔熻兘鎻忚堪:Actel Fusion Mixed-Signal FPGAs
M1AFS250-PQG256I 鍒堕€犲晢:ACTEL 鍒堕€犲晢鍏ㄧū:Actel Corporation 鍔熻兘鎻忚堪:Actel Fusion Mixed-Signal FPGAs
M1AFS250-PQG256PP 鍒堕€犲晢:ACTEL 鍒堕€犲晢鍏ㄧū:Actel Corporation 鍔熻兘鎻忚堪:Actel Fusion Mixed-Signal FPGAs
M1AFS250-QN256ES 鍒堕€犲晢:ACTEL 鍒堕€犲晢鍏ㄧū:Actel Corporation 鍔熻兘鎻忚堪:Actel Fusion Mixed-Signal FPGAs