参数资料
型号: CY7C4205-10ACT
厂商: CYPRESS SEMICONDUCTOR CORP
元件分类: FIFO
英文描述: 256 X 18 OTHER FIFO, 8 ns, PQFP64
封装: 14 X 14 MM, PLASTIC, TQFP-64
文件页数: 8/25页
文件大小: 412K
代理商: CY7C4205-10ACT
CY7C4425/4205/4215
CY7C4225/4235/4245
16
Depth Expansion Configuration
(with Programmable Flags)
The CY7C42X5 can easily be adapted to applications requir-
ing more than 64/256/512/1024/2048/4096 words of buffering.
Figure 2 shows Depth Expansion using three CY7C42X5s. Maxi-
mum depth is limited only by signal loading. Follow these steps:
1. The first device must be designated by grounding the First
Load (FL) control input.
2. All other devices must have FL in the HIGH state.
3. The Write Expansion Out (WXO) pin of each device must be
tied to the Write Expansion In (WXI) pin of the next device.
4. The Read Expansion Out (RXO) pin of each device must be
tied to the Read Expansion In (RXI) pin of the next device.
5. All Load (LD) pins are tied together.
6. The Half-Full Flag (HF) is not available in the Depth Expansion
Configuration.
7. EF, FF, PAE, and PAF are created with composite flags by
ORing together these respective flags for monitoring. The
composite PAE and PAF flags are not precise.
Figure 2. Block Diagram of 192 x 18/768 x 18/1536 x 18/3072 x 18/12288 x 18 Synchronous FIFO Memory
with Programmable Flags used in Depth Expansion Configuration.
42X5–23
WRITECLOCK (WCLK)
WRITE ENABLE (WEN)
RESET(RS)
LOAD (LD)
FF
PAF
FF
EF
PAE
EF
WXI RXI
FIRSTLOAD (FL)
READ CLOCK (RCLK)
READ ENABLE (REN)
OUTPUT ENABLE (OE)
WXO RXO
7C4425
7C4205
7C4215
7C4225
7C4235
PAF
FF
EF
PAE
WXI RXI
WXO RXO
7C4425
7C4205
7C4215
7C4225
7C4235
VCC
FIRSTLOAD (FL)
PAF
FF
EF
PAE
WXI RXI
WXO RXO
7C4425
7C4205
7C4215
7C4225
7C4235
VCC
FIRSTLOAD (FL)
DATAIN (D)
DATAOUT (Q)
相关PDF资料
PDF描述
CY7C4235V-25JC 2K X 18 OTHER FIFO, 15 ns, PQCC68
CY7C4241-35JC 4K X 9 OTHER FIFO, 20 ns, PQCC32
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CY7C4421-25AC 64 X 9 OTHER FIFO, 15 ns, PQFP32
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相关代理商/技术参数
参数描述
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