Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

CY7C4261V-15JI Datasheet(PDF) 4 Page - Cypress Semiconductor

Part # CY7C4261V-15JI
Description  16K/32K/64K/128K x 9 Low-Voltage Deep Sync FIFOs
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C4261V-15JI Datasheet(HTML) 4 Page - Cypress Semiconductor

  CY7C4261V-15JI Datasheet HTML 1Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 2Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 3Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 4Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 5Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 6Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 7Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 8Page - Cypress Semiconductor CY7C4261V-15JI Datasheet HTML 9Page - Cypress Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 16 page
background image
CY7C4261V/CY7C4271V
CY7C4281V/CY7C4291V
Document #: 38-06013 Rev. *A
Page 4 of 16
It is not necessary to write to all the offset registers at one time.
A subset of the offset registers can be written; then by bringing
the WEN2/LD input HIGH, the FIFO is returned to normal read
and write operation. The next time WEN2/LD is brought LOW,
a write operation stores data in the next offset register in
sequence.
The contents of the offset registers can be read to the data
outputs when WEN2/LD is LOW and both REN1 and REN2
are LOW. LOW-to-HIGH transitions of RCLK read register
contents to the data outputs. Writes and reads should not be
performed simultaneously on the offset registers.
Programmable Flag (PAE, PAF) Operation
Whether the flag offset registers are programmed as
described in Table 1 or the default values are used, the
programmable almost-empty flag (PAE) and programmable
almost-full flag (PAF) states are determined by their corre-
sponding offset registers and the difference between the read
and write pointers.
The number formed by the empty offset least significant bit
register and empty offset most significant bit register is
referred to as n and determines the operation of PAE. PAF is
synchronized to the LOW-to-HIGH transition of RCLK by one
flip-flop and is LOW when the FIFO contains n or fewer unread
words. PAE is set HIGH by the LOW-to-HIGH transition of
RCLK when the FIFO contains (n+1) or greater unread words.
The number formed by the full offset least significant bit
register and full offset most significant bit register is referred to
as m and determines the operation of PAF. PAE is synchronized to
the LOW-to-HIGH transition of WCLK by one flip-flop and is
set LOW when the number of unread words in the FIFO is
greater than or equal to CY7C4261V (16k – m), CY7C4271V
(32k – m), CY7C4281V (64k - m) and CY7C4291V (128k – m).
PAF is set HIGH by the LOW-to-HIGH transition of WCLK
when the number of available memory locations is greater
than m.
Note:
1.
The same selection sequence applies to reading from the registers. REN1 and REN2 are enabled and a read is performed on the LOW-to-HIGH transition of RCLK.
Figure 1. Offset Register Location and Default Values
64k x 9
8
0
8
0
8
0
Empty Offset (LSB) Reg.
Default Value = 007h
Full Offset (LSB) Reg
Default Value = 007h
(MSB)
7
7
7
8
0
8
0
8
0
8
0
Empty Offset (LSB) Reg.
Default Value = 007h
Full Offset (LSB) Reg
Default Value = 007h
(MSB)
(MSB)
7
7
128k x 9
8
0
(MSB)
7
Default Value = 000h
Default Value = 000h
Default Value = 000h
Default Value = 000h
16k x 9
8
0
8
0
8
0
Empty Offset (LSB) Reg.
Default Value = 007h
Full Offset (LSB) Reg
Default Value = 007h
(MSB)
7
5
7
8
0
8
0
8
0
0
Empty Offset (LSB) Reg.
Default Value = 007h
Full Offset (LSB) Reg
Default Value = 007h
(MSB)
(MSB)
7
7
32k x 9
0
(MSB)
Default Value = 000h
Default Value = 000h
Default Value = 000h
Default Value = 000h
6
8
5
8
6
Table 1. Writing the Offset Registers[1]
LD
WEN
WCLK
Selection
00
0
1
No Operation
1
0
Write Into FIFO
1
1
No Operation
Empty Offset (LSB)
Empty Offset (MSB)
Full Offset (LSB)
Full Offset (MSB)


Similar Part No. - CY7C4261V-15JI

ManufacturerPart #DatasheetDescription
logo
Cypress Semiconductor
CY7C4261V-15JI CYPRESS-CY7C4261V-15JI Datasheet
453Kb / 16P
   16K/32K/64K/128K x 9 Low-Voltage Deep Sync??FIFOs
More results

Similar Description - CY7C4261V-15JI

ManufacturerPart #DatasheetDescription
logo
Cypress Semiconductor
CY7C4261V CYPRESS-CY7C4261V_05 Datasheet
453Kb / 16P
   16K/32K/64K/128K x 9 Low-Voltage Deep Sync??FIFOs
CY7C4261 CYPRESS-CY7C4261 Datasheet
278Kb / 18P
   16K/32K x 9 Deep Sync FIFOs
CY7C4261 CYPRESS-CY7C4261_05 Datasheet
840Kb / 18P
   16K/32K x 9 Deep Sync FIFOs
CY7C4291 CYPRESS-CY7C4291 Datasheet
199Kb / 16P
   64K/128K x 9 Deep Sync FIFOs
CY7C4281 CYPRESS-CY7C4281_05 Datasheet
430Kb / 16P
   64K/128K x 9 Deep Sync FIFOs
CY7C4282V CYPRESS-CY7C4282V_03 Datasheet
219Kb / 15P
   64K/128K x 9 Low-Voltage Deep Sync FIFOs with Retransmit and Depth Expansion
CY7C4292 CYPRESS-CY7C4292 Datasheet
207Kb / 16P
   64K/128K x 9 Deep Sync FIFOs with Retransmit and Depth Expansion
CY7C4255V CYPRESS-CY7C4255V_02 Datasheet
289Kb / 20P
   32K/64Kx18 Low Voltage Deep Sync FIFOs
CY7C4255V CYPRESS-CY7C4255V Datasheet
283Kb / 20P
   32K/64Kx18 Low Voltage Deep Sync FIFOs
CY7C4255 CYPRESS-CY7C4255_09 Datasheet
655Kb / 23P
   8K/16K x 18 Deep Sync FIFOs
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com