Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

ATF1508AS-7JC84 Datasheet(PDF) 7 Page - ATMEL Corporation

Part # ATF1508AS-7JC84
Description  High Performance E2 PLD
Download  22 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATF1508AS-7JC84 Datasheet(HTML) 7 Page - ATMEL Corporation

Back Button ATF1508AS-7JC84 Datasheet HTML 3Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 4Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 5Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 6Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 7Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 8Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 9Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 10Page - ATMEL Corporation ATF1508AS-7JC84 Datasheet HTML 11Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 22 page
background image
ATF1508AS/Z
7
All ATF1508s also have an optional power down mode. In
this mode, current drops to below 10 mA. When the power
down option is selected, either PD1 or PD2 pins (or both)
can be used to power down the part. The power down
option is selected in the design source file. When enabled,
the device goes into power down when either PD1 or PD2
is high. In the power down mode, all internal logic signals
are latched and held, as are any enabled outputs.
All pin transitions are ignored until the PD pin is brought
low. When the power down feature is enabled, the PD1 or
PD2 pin cannot be used as a logic input or output. How-
ever, the pin’s macrocell may still be used to generate bur-
ied foldback and cascade logic signals.
All Power-Down AC Characteristic parameters are com-
puted from external input or I/O pins, with Reduced Power
Bit turned on. For macrocells in reduced-power mode
(Reduced power bit turned on), the reduced power adder,
tRPA, must be added to the AC parameters, which include
the data paths t
LAD, tLAC, tIC, tACL, tACH and tSEXP.
Each output also has individual slew rate control. This may
be used to reduce system noise by slowing down outputs
that do not need to operate at maximum speed. Outputs
default to slow switching, and may be specified as fast
switching in the design file.
Design Software Support
ATF1508AS designs are supported by several third party
tools. Automated fitters allow logic synthesis using a variety
of high level description languages and formats.
Power Up Reset
The ATF1508AS has a power-up reset option at two differ-
ent voltage trip levels when the device is being powered
down. Within the fitter, or during a conversion, if the
“power-reset” option is turned “on” ( which is the default
option), the trip levels during power up or power down is at
2.8V. The user can change this default option from “on” to
“off” (within the fitter or specify it as a switch during conver-
sion). When this is done, the voltage trip level during
power-down changes from 2.8V to 0.7V. This is to ensure a
robust operating environment.
The registers in the ATF1508AS are designed to reset dur-
ing power up. At a point delayed slightly from V
CC crossing
V
RST, all registers will be reset to the low state. The output
state will depend on the polarity of the buffer.
This feature is critical for state machine initialization. How-
ever, due to the asynchronous nature of reset and the
uncertainty of how V
CC actually rises in the system, the fol-
lowing conditions are required:
1. The V
CC rise must be monotonic,
2. After reset occurs, all input and feedback setup times
must be met before driving the clock pin high, and,
3. The clock must remain stable during T
PR.
Security Fuse Usage
A single fuse is provided to prevent unauthorized copying
of the ATF1508AS fuse patterns. Once programmed, fuse
verify is inhibited. However, User Signature and device ID
remains accessible.
Programming
ATF1508AS devices are In-System Programmable (ISP)
devices utilizing the 4-pin JTAG protocol. This capability
eliminates package handling normally required for program
and facilitates rapid design iterations and field changes.
Atmel provides ISP hardware and software to allow pro-
gramming of the ATF1508AS via the PC. ISP is perfomed
by using either a download cable, or a comparable board
tester or a simple microprocessor interface.
To facilitate ISP programming by the Automated Test
Equipment (ATE) vendors, Serial Vector Format (SVF)
files can be created by Atmel provided Software utilities.
ATF1508AS devices can also be programmed using stan-
dard 3rd party programmers. With 3rd party programmer
the JTAG ISP port can be disabled thereby allowing 4 addi-
tional I/O pins to be used for logic.
Contact your local Atmel representatives or Atmel PLD
applications for details.
ISP Programming Protection
The ATF1508AS has a special feature which locks the
device and prevents the inputs and I/O from driving if the
programming process is interrupted due to any reason. The
inputs and I/O default to high-Z state during such a condi-
tion. In addition the pin keeper option preserves the former
state during device programming.
All ATF1508AS devices are initially shipped in the erased
state thereby making them ready to use for ISP.
Note:
For more information refer to the “Desigining for In-Sys-
tem Programmability with Atmel CPLDs” application
note.


Similar Part No. - ATF1508AS-7JC84

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation
ATF1508AS-7JC84 ATMEL-ATF1508AS-7JC84 Datasheet
717Kb / 31P
   Highperformance EE PLD
More results

Similar Description - ATF1508AS-7JC84

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation
ATF1500A ATMEL-ATF1500A Datasheet
680Kb / 16P
   High Performance E2 PLD
ATF22V10CZ ATMEL-ATF22V10CZ Datasheet
270Kb / 9P
   High Performance E2 PLD
ATF22LV10CZ ATMEL-ATF22LV10CZ Datasheet
222Kb / 9P
   High Performance E2 PLD
ATF22LV10C ATMEL-ATF22LV10C Datasheet
240Kb / 19P
   High Performance E2 PLD
ATF16V8C ATMEL-ATF16V8C Datasheet
545Kb / 16P
   High Performance E2 PLD
ATF22V10C ATMEL-ATF22V10C Datasheet
234Kb / 8P
   High Performance E2 PLD
ATF16V8CZ ATMEL-ATF16V8CZ Datasheet
381Kb / 10P
   High Performance E2 PLD
ATF22V10B ATMEL-ATF22V10B Datasheet
886Kb / 14P
   High- Performance EE PLD
ATF16V8B ATMEL-ATF16V8B_1 Datasheet
657Kb / 16P
   High Performance Flash PLD
ATF16V8BQL-15PU ATMEL-ATF16V8BQL-15PU Datasheet
641Kb / 26P
   High performance EE PLD
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22


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