Instruction Manual

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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

= 4.5V to 5.5V)

– 2.7 (V

= 2.7V to 5.5V)

• 3.0 MHz Clock Rate (5V)

• 32-byte Page Mode

• 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: One Million Write Cycles

– Data Retention: 100 Years

• 8-lead PDIP and 8-lead JEDEC SOIC Packages

Description

The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electri-

cally-erasable programmable read only memory (EEPROM) organized as

1024/2048/4096/8192 words of 8 bits each. The device is optimized for use in many

automotive applications where low-power and low-voltage operation are essential.

The AT25080/160/320/640 is available in space saving 8-lead PDIP and 8-lead

JEDEC SOIC packages.

The AT25080/160/320/640 is enabled through the Chip Select pin (CS

) and accessed

via a 3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and

Serial Clock (SCK). All programming cycles are completely self-timed, and no sepa-

rate ERASE cycle is required before WRITE.

BLOCK WRITE protection is enabled by programming the status register with one of

four blocks of write protection. Separate program enable and program disable instruc-

tions are provided for additional data protection. Hardware data protection is provided

via the WP

pin to protect against inadvertent write attempts to the status register. The

HOLD

pin may be used to suspend any serial communication without resetting the

serial sequence.

SPI Serial

Automotive

EEPROMs

8K (1024 x 8)

16K (2048 x 8)

32K (4096 x 8)

64K (8192 x 8)

AT25080

AT25160

AT25320

AT25640

3260D–SEEPR–9/03

Pin Configuration

Pin Name Function

Chip Select

SCK Serial Data Clock

SI Serial Data Input

SO Serial Data Output

GND Ground

VCC Power Supply

Write Protect

HOLD

Suspends Serial Input

NC No Connect

DC Don’t Connect

8-lead PDIP

GND

VCC

HOLD

SCK

8-lead SOIC

GND

VCC

HOLD

SCK

Summary of content (19 pages)

PAGE 1
Features • Serial Peripheral Interface (SPI) Compatible • Supports SPI Modes 0 (0,0) and 3 (1,1) • Medium-voltage and Standard-voltage Operation • • • • • • • – 5.0 (VCC = 4.5V to 5.5V) – 2.7 (VCC = 2.7V to 5.5V) 3.
PAGE 2
Absolute Maximum Ratings* Operating Temperature.................................. -55°C to +125°C Storage Temperature ..................................... -65°C to +150°C Voltage on Any Pin with Respect to Ground .....................................-1.0V to +7.0V Maximum Operating Voltage .......................................... 6.25V *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
PAGE 3
AT25080/160/320/640 Pin Capacitance(1) Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, VCC = +5.0V (unless otherwise noted). Symbol Test Conditions Max Units Conditions COUT Output Capacitance (SO) 8 pF VOUT = 0V CIN Input Capacitance (CS, SCK, SI, WP, HOLD) 6 pF VIN = 0V Note: 1. This parameter is characterized and is not 100% tested. DC Characteristics(1) Applicable over recommended operating range from: TA = -40°C to +125°C, VCC = +2.7V to +5.
PAGE 4
AC Characteristics Applicable over recommended operating range from TA = -40°C to +125°C, VCC = As Specified, CL = 1 TTL Gate and 100 pF (unless otherwise noted). Symbol Parameter Voltage Min Max Units fSCK SCK Clock Frequency 4.5 - 5.5 2.7 - 5.5 0 0 3.0 2.1 MHz tRI Input Rise Time 4.5 - 5.5 2.7 - 5.5 2 2 µs tFI Input Fall Time 4.5 - 5.5 2.7 - 5.5 2 2 µs tWH SCK High Time 4.5 - 5.5 2.7 - 5.5 133 200 ns tWL SCK Low Time 4.5 - 5.5 2.7 - 5.5 133 200 ns tCS CS High Time 4.
PAGE 5
AT25080/160/320/640 Serial Interface Description MASTER: The device that generates the serial clock. SLAVE: Because the Serial Clock pin (SCK) is always an input, the AT25080/160/320/640 always operates as a slave. TRANSMITTER/RECEIVER: The AT25080/160/320/640 has separate pins designated for data transmission (SO) and reception (SI). MSB: The Most Significant Bit (MSB) is the first bit transmitted and received.
PAGE 6
SPI Serial Interface 6 AT25080/160/320/640 3260D–SEEPR–9/03
PAGE 7
AT25080/160/320/640 Functional Description The AT25080/160/320/640 is designed to interface directly with the synchronous serial peripheral interface (SPI) of the 6805 and 68HC11 series of microcontrollers. The AT25080/160/320/640 utilizes an 8-bit instruction register. The list of instructions and their operation codes are contained in Table 1. All instructions, addresses, and data are transferred with the MSB first and start with a high-to-low CS transition. Table 1.
PAGE 8
WRITE STATUS REGISTER (WRSR): The WRSR instruction allows the user to select one of four levels of protection. The AT25080/160/320/640 is divided into four array segments. One quarter (1/4), one half (1/2), or all of the memory segments can be protected. Any of the data within any selected segment will therefore be READ only. The block write protection levels and corresponding status register control bits are shown in Table 4.
PAGE 9
AT25080/160/320/640 READ SEQUENCE (READ): Reading the AT25080/160/320/640 via the SO (Serial Output) pin requires the following sequence. After the CS line is pulled low to select a device, the READ op-code is transmitted via the SI line followed by the byte address to be read (A15 - A0, Refer to Table 6). Upon completion, any data on the SI line will be ignored. The data (D7 - D0) at the specified address is then shifted out onto the SO line.
PAGE 10
Timing Diagrams Synchronous Data Timing (for Mode 0) t CS VIH CS VIL t CSH t CSS VIH t WH SCK t WL VIL tH t SU VIH SI VALID IN VIL tV VOH SO HI-Z t HO t DIS HI-Z VOL WREN Timing WRDI Timing 10 AT25080/160/320/640 3260D–SEEPR–9/03
PAGE 11
AT25080/160/320/640 RDSR Timing CS 0 1 2 3 4 5 6 7 8 9 7 6 10 11 12 13 14 15 2 1 0 13 14 15 DATA IN 4 3 2 1 0 SCK INSTRUCTION SI SO DATA OUT HIGH IMPEDANCE 5 4 3 MSB WRSR Timing CS 0 1 2 3 4 5 6 7 8 9 10 7 6 5 11 12 SCK SI SO INSTRUCTION HIGH IMPEDANCE 11 3260D–SEEPR–9/03
PAGE 12
READ Timing CS 0 1 2 3 4 5 6 7 8 9 10 11 20 21 22 23 24 25 26 27 28 29 30 31 SCK SI SO BYTE ADDRESS 15 14 13 ... 3 2 1 0 INSTRUCTION DATA OUT HIGH IMPEDANCE 7 6 5 4 3 2 1 0 MSB WRITE Timing CS 0 1 2 3 4 5 6 7 8 9 10 11 20 21 22 23 24 25 26 27 28 29 30 31 SCK SI SO BYTE ADDRESS DATA IN ...
PAGE 13
AT25080/160/320/640 AT25080 Ordering Information Ordering Code Package Operation Range AT25080-10PA-5.0C AT25080N-10SA-5.0C 8P3 8S1 Automotive (-40°C to 125°C) AT25080-10PA-2.7C AT25080N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 14
AT25160 Ordering Information Ordering Code Package Operation Range AT25160-10PA-5.0C AT25160N-10SA-5.0C 8P3 8S1 Automotive (-40°C to 125°C) AT25160-10PA-2.7C AT25160N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 15
AT25080/160/320/640 AT25320 Ordering Information Ordering Code Package Operation Range AT25320-10PA-5.0C AT25320N-10SA-5.0C 8P3 8S1 Automotive (-40°C to 125°C) AT25320-10PA-2.7C AT25320N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 16
AT25640 Ordering Information Ordering Code Package Operation Range AT25640-10PA-5.0C AT25640N-10SA-5.0C 8P3 8S1 Automotive (-40°C to 125°C) AT25640-10PA-2.7C AT25640N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 17
AT25080/160/320/640 Packaging Information 8P3 – PDIP E 1 E1 N Top View c eA End View COMMON DIMENSIONS (Unit of Measure = inches) D e D1 A2 A MIN NOM A2 0.115 0.130 0.195 b 0.014 0.018 0.022 5 b2 0.045 0.060 0.070 6 b3 0.030 0.039 0.045 6 c 0.008 0.010 0.014 D 0.355 0.365 0.400 D1 0.005 E 0.300 0.310 0.325 4 E1 0.240 0.250 0.280 3 SYMBOL A b2 b3 b 4 PLCS Side View L Notes: 0.210 0.100 BSC eA 0.300 BSC 0.115 NOTE 2 3 3 e L MAX 0.130 4 0.
PAGE 18
8S1 – JEDEC SOIC 3 2 1 H N Top View e B A D COMMON DIMENSIONS (Unit of Measure = mm) Side View A2 C L SYMBOL MIN NOM MAX A – – 1.75 B – – 0.51 C – – 0.25 D – – 5.00 E – – 4.00 e E End View NOTE 1.27 BSC H – – 6.20 L – – 1.27 Note: This drawing is for general information only. Refer to JEDEC Drawing MS-012 for proper dimensions, tolerances, datums, etc. 10/10/01 R 18 2325 Orchard Parkway San Jose, CA 95131 TITLE 8S1, 8-lead (0.
PAGE 19
Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg.