Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.NET

X  

Preview PDF Download HTML

EP2C8T144I8N Datasheet(PDF) 73 Page - Altera Corporation

Part No. EP2C8T144I8N
Description  Cyclone II Device Handbook, Volume 1
Download  470 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ALTERA [Altera Corporation]
Direct Link  http://www.altera.com
Logo ALTERA - Altera Corporation

EP2C8T144I8N Datasheet(HTML) 73 Page - Altera Corporation

Back Button EP2C8T144I8N Datasheet HTML 69Page - Altera Corporation EP2C8T144I8N Datasheet HTML 70Page - Altera Corporation EP2C8T144I8N Datasheet HTML 71Page - Altera Corporation EP2C8T144I8N Datasheet HTML 72Page - Altera Corporation EP2C8T144I8N Datasheet HTML 73Page - Altera Corporation EP2C8T144I8N Datasheet HTML 74Page - Altera Corporation EP2C8T144I8N Datasheet HTML 75Page - Altera Corporation EP2C8T144I8N Datasheet HTML 76Page - Altera Corporation EP2C8T144I8N Datasheet HTML 77Page - Altera Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 73 / 470 page
background image
Altera Corporation
2–47
February 2007
Cyclone II Device Handbook, Volume 1
Cyclone II Architecture
You can use any of the DQ pins for the parity pins in Cyclone II devices.
The Cyclone II device family supports parity in the ×8/×9, and ×16/×18
mode. There is one parity bit available per eight bits of data pins.
The data mask, DM, pins are required when writing to DDR SDRAM and
DDR2 SDRAM devices. A low signal on the DM pin indicates that the
write is valid. If the DM signal is high, the memory masks the DQ signals.
In Cyclone II devices, the DM pins are assigned and are the preferred
pins. Each group of DQS and DQ signals requires a DM pin.
When using the Cyclone II I/O banks to interface with the DDR memory,
at least one PLL with two clock outputs is needed to generate the system
and write clock. The system clock is used to clock the DQS write signals,
commands, and addresses. The write clock is shifted by –90° from the
system clock and is used to clock the DQ signals during writes.
Figure 2–27 illustrates DDR SDRAM interfacing from the I/O through
the dedicated circuitry to the logic array.
EP2C35
484-pin FineLine BGA
16 (4)
888
672-pin FineLine BGA
20 (4)
888
EP2C50
484-pin FineLine BGA
16 (4)
888
672-pin FineLine BGA
20 (4)
888
EP2C70
672-pin FineLine BGA
20 (4)
888
896-pin FineLine BGA
20 (4)
888
Notes to Table 2–15:
(1)
Numbers are preliminary.
(2)
EP2C5 and EP2C8 devices in the 144-pin TQFP package do not have any DQ pin groups in I/O bank 1.
(3)
Because of available clock resources, only a total of 6 DQ/DQS groups can be implemented.
(4)
Because of available clock resources, only a total of 14 DQ/DQS groups can be implemented.
(5)
The ×9 DQS/DQ groups are also used as ×8 DQS/DQ groups. The ×18 DQS/DQ groups are also used as ×16
DQS/DQ groups.
(6)
For QDRI implementation, if you connect the D ports (write data) to the Cyclone II DQ pins, the total available ×9
DQS /DQ and ×18 DQS/DQ groups are half of that shown in Table 2–15.
Table 2–15. Cyclone II DQS & DQ Bus Mode Support (Part 2 of 2)
Note (1)
Device
Package
Number of ×8
Groups
Number of ×9
Groups (5), (6)
Number of ×16
Groups
Number of ×18
Groups (5), (6)


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90  91  92  93  94  95  96  97  98  99  100   ...More


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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