參數(shù)資料
型號(hào): CY7C4255-10
廠商: Cypress Semiconductor Corp.
英文描述: 8K/16K x 18 Deep Sync FIFOs
中文描述: 8K/16K × 18深同步FIFO的
文件頁(yè)數(shù): 16/22頁(yè)
文件大?。?/td> 348K
代理商: CY7C4255-10
CY7C4255
CY7C4265
Document #: 38-06004 Rev. *B
Page 16 of 22
Retransmit
The retransmit feature is beneficial when transferring packets
of data. It enables the receipt of data to be acknowledged by
the receiver and retransmitted if necessary.
The Retransmit (RT) input is active in the stand-alone and
width expansion modes. The retransmit feature is intended for
use when a number of writes equal to or less than the depth
of the FIFO have occurred and at least one word has been
read since the last RS cycle. A HIGH pulse on RT resets the inter-
nal read pointer to the first physical location of the FIFO. WCLK and
RCLK may be free running but must be disabled during and t
RTR
after the retransmit pulse. With every valid read cycle after retransmit,
previously accessed data is read and the read pointer is incremented
until it is equal to the write pointer. Flags are governed by the relative
locations of the read and write pointers and are updated during a
retransmit cycle. Data written to the FIFO after activation of RT are
transmitted also.
The full depth of the FIFO can be repeatedly retransmitted.
Table 2. Flag Truth Table
Number of Words in FIFO
FF
H
H
H
H
H
L
PAF
H
H
H
H
L
L
HF
H
H
H
L
L
L
PAE
L
L
H
H
H
H
EF
L
H
H
H
H
H
CY7C4255 – 8K x 18
CY7C4265 – 16K x 18
0
1 to n
[38]
(n+1) to 4096
4097 to (8192–(m+1))
(8192–m)
[39]
to 8191
8192
0
1 to n
[38]
(n+1) to 8192
8193 to (16384 –(m+1))
(16384–m)
[39]
to 16383
16384
Notes:
38. n = Empty Offset (Default Values: CY7C4255/CY7C4265 n = 127).
39. m = Full Offset (Default Values: CY7C4255/CY7C4265 n = 127).
相關(guān)PDF資料
PDF描述
CY7C4255-15 8K/16K x 18 Deep Sync FIFOs
CY7C4255-25 8K/16K x 18 Deep Sync FIFOs
CY7C4255-35 8K/16K x 18 Deep Sync FIFOs
CY7C4265-10 8K/16K x 18 Deep Sync FIFOs
CY7C4265-15 8K/16K x 18 Deep Sync FIFOs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY7C4255-10AC 功能描述:IC DEEP SYNC FIFO 8KX18 64LQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:CY7C 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256(64 x 4) 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP(0.300",7.62mm) 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
CY7C4255-10AXC 功能描述:IC DEEP SYNC FIFO 8KX18 64LQFP RoHS:是 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:CY7C 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256(64 x 4) 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP(0.300",7.62mm) 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
CY7C4255-10AXCT 功能描述:IC SYNC FIFO MEM 8KX18 64LQFP RoHS:是 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:CY7C 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256(64 x 4) 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP(0.300",7.62mm) 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
CY7C4255-15AXC 功能描述:IC SYNC FIFO MEM 8KX18 64LQFP RoHS:是 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:CY7C 標(biāo)準(zhǔn)包裝:15 系列:74F 功能:異步 存儲(chǔ)容量:256(64 x 4) 數(shù)據(jù)速率:- 訪問(wèn)時(shí)間:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:24-DIP(0.300",7.62mm) 供應(yīng)商設(shè)備封裝:24-PDIP 包裝:管件 其它名稱:74F433
CY7C4255V-10ASXC 功能描述:先進(jìn)先出 8K X18 LOW VOLTAGE DEEP SYNC 先進(jìn)先出 RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問(wèn)時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: