SUPERSYNC FIFOTM
參數(shù)資料
型號: IDT72V2111L15PFI8
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 18/27頁
文件大?。?/td> 0K
描述: IC FIFO SS 512X9 15NS 64QFP
標準包裝: 750
系列: 72V
功能: 同步
存儲容量: 4.6K(512 x 9)
訪問時間: 15ns
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應商設備封裝: 64-TQFP(14x14)
包裝: 帶卷 (TR)
其它名稱: 72V2111L15PFI8
25
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V2101/72V2111 3.3V HIGH DENSITY CMOS
SUPERSYNC FIFOTM 262,144 x 9, 524,288 x 9
NOTES:
1. Use an AND gate in IDT Standard mode, an OR gate in FWFT mode.
2. Do not connect any output control signals directly together.
3. FIFO #1 and FIFO #2 must be the same depth, but may be different word widths.
OPTIONAL CONFIGURATIONS
WIDTH EXPANSION CONFIGURATION
Word width may be increased simply by connecting together the control
signals of multiple devices. Status flags can be detected from any one
device. The exceptions are the
EF and FF functions in IDT Standard mode
and the
IR and OR functions in FWFT mode. Because of variations in skew
between RCLK and WCLK, it is possible for
EF/FF deassertion and IR/OR
assertion to vary by one cycle between FIFOs. In IDT Standard mode, such
Figure 19. Block Diagram of 262,144 x 18 and 524,288 x 18 Width Expansion
problems can be avoided by creating composite flags, that is, ANDing
EF of
every FIFO, and separately ANDing
FF of every FIFO. In FWFT mode,
composite flags can be created by ORing
OR of every FIFO, and separately
ORing
IR of every FIFO.
Figure 19 demonstrates a width expansion using two IDT72V2101/
72V2111 devices. D0 - D8 from each device form an 18-bit wide input bus and
Q0-Q8 from each device form an 18-bit wide output bus. Any word width can
be attained by adding additional IDT72V2101/72V2111 devices.
WRITE CLOCK (WCLK)
m + n
m
n
MASTER RESET (MRS)
READ CLOCK (RCLK)
DATA OUT
n
m + n
WRITE ENABLE (WEN)
FULL FLAG/INPUT READY (FF/IR)
PROGRAMMABLE (PAF)
PROGRAMMABLE (PAE)
EMPTY FLAG/OUTPUT READY (EF/OR) #2
OUTPUT ENABLE (OE)
READ ENABLE (REN)
m
LOAD (LD)
IDT
72V2101
72V2111
EMPTY FLAG/OUTPUT READY (EF/OR) #1
PARTIAL RESET (PRS)
IDT
72V2101
72V2111
4669 drw 22
FULL FLAG/INPUT READY (FF/IR) #2
HALF-FULL FLAG (HF)
FIRST WORD FALL THROUGH/
SERIAL INPUT (FWFT/SI)
RETRANSMIT (RT)
#1
FIFO
#2
GATE
(1)
GATE
(1)
D0 - Dm
DATA IN
Dm+1 - Dn
Q0 - Qm
Qm+1 - Qn
FIFO
#1
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