Rainbow-electronics AT25256 Bedienungsanleitung

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Seitenansicht 0
1
8-lead SOIC
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Medium-voltage and Standard-voltage Operation
5.0 (V
CC
= 4.5V to 5.5V)
2.7 (V
CC
= 2.7V to 5.5V)
3 MHz Clock Rate
64-byte Page Mode and Byte Write Operation
Block Write Protection
Protect 1/4, 1/2, or Entire Array
Write Protect (WP) Pin and Write Disable Instructions for
both Hardware and Software Data Protection
Self-timed Write Cycle (5 ms Typical)
High-reliability
Endurance: 100,000 Write Cycles
Data Retention: >200 Years
8-lead PDIP, 8-lead JEDEC SOIC and 8-lead EIAJ SOIC Packages
Description
The AT25128/256 provides 131,072/262,144 bits of serial electrically-erasable pro-
grammable read only memory (EEPROM) organized as 16,384/32,768 words of 8 bits
each. The device is optimized for use in many industrial and commercial applications
where low-power and low-voltage operation are essential. The devices are available in
space saving 8-lead PDIP (AT25128/256), 8-lead JEDEC SOIC (AT25128) and 8-lead
EIAJ SOIC (AT25256) packages. In addition, the entire family is available in 5.0V
(4.5V to 5.5V) and 2.7V (2.7V to 5.5V) versions.
Rev. 3262C–SEEPR–6/03
SPI Serial
Automotive
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
AT25128
AT25256
Pin Configurations
Pin Name Function
CS
Chip Select
SCK Serial Data Clock
SI Serial Data Input
SO Serial Data Output
GND Ground
VCC Power Supply
WP
Write Protect
HOLD
Suspends Serial Input
NC No Connect
DC Don't Connect
8-lead PDIP
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
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Inhaltsverzeichnis

Seite 1 - Automotive

18-lead SOIC12348765CSSOWPGNDVCCHOLDSCKSIFeatures• Serial Peripheral Interface (SPI) Compatible• Supports SPI Modes 0 (0,0) and 3 (1,1)• Medium-voltag

Seite 2

10AT25128/2563262C–SEEPR–6/03Timing Diagrams (for SPI Mode 0 (0, 0))Synchronous Data TimingWREN TimingWRDI TimingSOVOHVOLHI-ZHI-ZtVVALID INSIVIHVILtHt

Seite 3

11AT25128/2563262C–SEEPR–6/03RDSR TimingWRSR TimingREAD TimingCSSCK01234567891011121314SIINSTRUCTIONSO76543210DATA OUTMSBHIGH IMPEDANCE15

Seite 4

12AT25128/2563262C–SEEPR–6/03WRITE TimingHOLD Timing SOSCKHOLDtCDtHDtHZtLZtCDtHDCS

Seite 5

13AT25128/2563262C–SEEPR–6/03 AT25128 Ordering Information Ordering Code Package Operation RangeAT25128-10PA-5.0CAT25128N-10SA-5.0C8P38S1Automotive(-4

Seite 6

14AT25128/2563262C–SEEPR–6/03 AT25256 Ordering InformationOrdering Code Package Operation RangeAT25256-10PA-5.0CAT25256W-10SA-5.0C8P38S2Automotive(-40

Seite 7

15AT25128/2563262C–SEEPR–6/03Packaging Information8P3 – PDIP 2325 Orchard ParkwaySan Jose, CA 95131TITLEDRAWING NO.RREV. 8P3, 8-lead, 0.300" W

Seite 8

16AT25128/2563262C–SEEPR–6/038S1 – JEDEC SOIC 2325 Orchard Parkway San Jose, CA 95131TITLEDRAWING NO.RREV. Note:10/10/018S1, 8-lead (0.150"

Seite 9

17AT25128/2563262C–SEEPR–6/038S2 – EIAJ SOIC 2325 Orchard ParkwaySan Jose, CA 95131TITLEDRAWING NO.RREV. 8S2, 8-lead, 0.209" Body, Plastic Sma

Seite 10 - AT25128/256

Printed on recycled paper.3262C–SEEPR–6/03 xMDisclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly

Seite 11

2AT25128/2563262C–SEEPR–6/03The AT25128/256 is enabled through the Chip Select pin (CS) and accessed via a 3-wire interface consisting of Serial DataI

Seite 12

3AT25128/2563262C–SEEPR–6/03Note: 1. This parameter is characterized and is not 100% tested.Note: 1. VIL and VIH max are reference only and are not te

Seite 13

4AT25128/2563262C–SEEPR–6/03Note: 1. This parameter is characterized and is not 100% tested. Contact Atmel for further information.AC CharacteristicsA

Seite 14

5AT25128/2563262C–SEEPR–6/03Serial Interface DescriptionMASTER: The device that generates the serial clock.SLAVE: Because the Serial Clock pin (SCK) i

Seite 15

6AT25128/2563262C–SEEPR–6/03SPI Serial Interface Functional DescriptionThe AT25128/256 is designed to interface directly with the synchronous serial

Seite 16

7AT25128/2563262C–SEEPR–6/03WRITE ENABLE (WREN): The device will power-up in the write disable state when VCCis applied. All programming instructions

Seite 17

8AT25128/2563262C–SEEPR–6/03The WRSR instruction also allows the user to enable or disable the write protect (WP)pin through the use of the Write Prot

Seite 18 - Regional Headquarters

9AT25128/2563262C–SEEPR–6/03The AT25128/256 is capable of a 64-byte PAGE WRITE operation. After each byte ofdata is received, the six low order addres

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