參數(shù)資料
型號(hào): IDT72T20108L10BBI
廠商: Integrated Device Technology, Inc.
英文描述: 2.5 VOLT HIGH-SPEED TeraSync⑩ DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATION
中文描述: 2.5伏高速TeraSync⑩復(fù)員/特別提款權(quán)先進(jìn)先出20-BIT/10-BIT配置
文件頁(yè)數(shù): 22/51頁(yè)
文件大小: 496K
代理商: IDT72T20108L10BBI
22
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T2098/108/118/128 2.5V HIGH-SPEED TeraSync DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATIONS
32K x 20/64K x 10, 64K x 20/128K x 10, 128K x 20/256K x 10, 256K x 20/512K x 10
TABLE 7 — BUS-MATCHING WRITE TO READ RATIO (CONTINUED)
ONE WRITE TO FOUR READ (1:4)
x20 DDR Input to x10 SDR Output
Configuration
WSDR
RSDR
H
L
DDR Write Clock x20 Data In
Positive Edge 1
Positive Edge 1
Negative Edge 1 D[19:10] <= B3 Positive Edge 3
Negative Edge 1 D[9:0]
SDR Read Clock x10 Data Out
D[19:10] <= B1 Positive Edge 1
D[9:0]
<= B2
Q[9:0] <= B1
Q[9:0] <= B2
Q[9:0] <= B3
Q[9:0] <= B4
Positive Edge 2
<= B4
Positive Edge 4
TWO WRITE TO ONE READ (2:1)
x20 SDR Input to x20 DDR Output
Configuration
WSDR
RSDR
L
H
SDR Write Clock x20 Data In
Positive Edge 1
Positive Edge 2
DDR Read Clock x20 Data Out
D[19:0] <= W1 Positive Edge 1
D[19:0] <= W2 Negative Edge 1 Q[19:0] <= W2
Q[19:0] <= W1
x10 DDR Input to x20 DDR Output
Configuration
WSDR
RSDR
H
H
DDR Write Clock x10 Data In
Positive Edge 1
Negative Edge 1 D[9:0]
Positive Edge 2
Negative Edge 2 D[9:0]
DDR Read Clock x20 Data Out
<= B1 Positive Edge 1
<= B2 Postive Edge 1
<= B3 Negative Edge 1 Q[19:10] <= B3
<= B4 Negative Edge 1 Q[9:0]
D[9:0]
Q[19:10] <= B1
Q[9:0]
<= B2
D[9:0]
<= B4
x10 SDR Input to x20 SDR Output
Configuration
WSDR
RSDR
L
L
SDR Write Clock x10 Data In
Positive Edge 1
Positive Edge 2
SDR Read Clock x20 Data Out
D[19:10] <= B1 Positive Edge 1
D[9:0] <= B2
Q[19:10] <= B1
Q[9:0] <= B2
Positive Edge 1
x10 SDR Input to x10 DDR Output
Configuration
WSDR
RSDR
L
H
DDR Write Clock x10 Data In
Positive Edge 1
Positive Edge 2
SDR Read Clock x10 Data Out
<= B1 Positive Edge 1
<= B3 Negative Edge 1 Q[9:0]
D[9:0]
D[9:0]
Q[9:0]
<= B1
<= B3
IW
L
OW
L
FOUR WRITE TO ONE READ (4:1)
x10 SDR Input to x20 DDR Output
Configuration
WSDR
RSDR
L
H
SDR Write Clock x10 Data In
Positive Edge 1
Positive Edge 2
Positive Edge 3
Positive Edge 4
DDR Read Clock x20 Data Out
Positive Edge 1
Positive Edge 1
Negative Edge 1 Q[19:0] <= B3
Negative Edge 1 Q[9:0] <= B4
D[9:0] <= B1
D[9:0] <= B2
D[9:0] <= B3
D[9:0] <= B4
Q[19:10] <= B1
Q[9:0] <= B2
IW
L
OW
L
IW
H
OW
L
IW
H
OW
L
IW
H
OW
H
IW
H
OW
L
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