User Manual

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Features

• Serial Peripheral Interface (SPI) Compatible

• Supports SPI Modes 0 (0,0) and 3 (1,1)

– Data Sheet Describes Mode 0 Operation

• Medium-voltage and Standard-voltage Operation

– 5.0 (V

= 4.5V to 5.5V)

– 2.7 (V

= 2.7V to 5.5V)

• 5.0 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 (2 ms [5V] typical)

• High Reliability

– Endurance: One Million Write Cycles

– Data Retention: 100 Years

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

Description

The AT25080A/160A/320A/640A provides 8192/16384/32768/65536 bits of serial

electrically-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 AT25080A/160A/320A/640A is available in space saving 8-lead PDIP and 8-lead

JEDEC SOIC packages.

The AT25080A/160A/320A/640A is enabled through the Chip Select pin (CS

) and

accessed via a three-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 separate 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 instructions 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 sus-

pend any serial communication without resetting the serial sequence.

Table 1. 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

SPI Serial

Automotive

EEPROMs

8K (1024 x 8)

16K (2048 x 8)

32K (4096 x 8)

64K (8192 x 8)

AT25080A

AT25160A

AT25320A

AT25640A

3401C–SEEPR–8/04

GND

VCC

HOLD

SCK

GND

VCC

HOLD

SCK

8-lead PDIP

8-lead SOIC

Summary of content (19 pages)

PAGE 1
Features • Serial Peripheral Interface (SPI) Compatible • Supports SPI Modes 0 (0,0) and 3 (1,1) – Data Sheet Describes Mode 0 Operation • Medium-voltage and Standard-voltage Operation • • • • • • • – 5.0 (VCC = 4.5V to 5.5V) – 2.7 (VCC = 2.7V to 5.5V) 5.
PAGE 2
Absolute Maximum Ratings* Operating Temperature......................................−40°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
AT25080A/160A/320A/640A Table 2. 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. Table 3. DC Characteristics(1) Applicable over recommended operating range from: TA = −40°C to +125°C, VCC = +2.
PAGE 4
Table 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 5.0 3.0 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 80 133 ns tWL SCK Low Time 4.5–5.5 2.7–5.5 80 133 ns tCS CS High Time 4.5–5.5 2.7–5.
PAGE 5
AT25080A/160A/320A/640A Serial Interface Description MASTER: The device that generates the serial clock. S L AV E : B e c a u s e t h e S e r i a l C l o c k p i n ( S C K ) i s a l w a y s a n i n p u t , t h e AT25080A/160A/320A/640A always operates as a slave. TRANSMITTER/RECEIVER: The AT25080A/160A/320A/640A 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
Figure 2.
PAGE 7
AT25080A/160A/320A/640A Functional Description The AT25080A/160A/320A/640A is designed to interface directly with the synchronous serial peripheral interface (SPI) of the 6805 and 68HC11 series of microcontrollers. The AT25080A/160A/320A/640A utilizes an 8-bit instruction register. The list of instructions and their operation codes are contained in Table 5. All instructions, addresses, and data are transferred with the MSB first and start with a high-to-low CS transition. Table 5.
PAGE 8
WRITE STATUS REGISTER (WRSR): The WRSR instruction allows the user to select one of four levels of protection. The AT25080A/160A/320A/640A is divided into four array segments. One-quarter, one-half, 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 8.
PAGE 9
AT25080A/160A/320A/640A READ SEQUENCE (READ): Reading the AT25080A/160A/320A/640A via the serial output (SO) 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; see Table 10). 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 Figure 3. 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 Figure 4. WREN Timing Figure 5.
PAGE 11
AT25080A/160A/320A/640A Figure 6. RDSR Timing CS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 3 2 1 0 12 13 14 15 2 1 0 SCK INSTRUCTION SI SO DATA OUT HIGH IMPEDANCE 7 6 5 4 MSB Figure 7.
PAGE 12
Figure 8. 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 BYTE ADDRESS 15 14 13 ... INSTRUCTION SI 3 2 1 0 DATA OUT HIGH IMPEDANCE 7 SO 6 5 4 3 2 1 0 MSB Figure 9. 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 15 14 13 ... 3 2 1 INSTRUCTION DATA IN 0 7 6 5 4 3 2 1 0 HIGH IMPEDANCE Figure 10.
PAGE 13
AT25080A/160A/320A/640A AT25080A Ordering Information Ordering Code Package Operation Range AT25080A-10PA-5.0C AT25080AN-10SA-5.0C 8P3 8S1 Automotive (−40°C to 125°C) AT25080A-10PA-2.7C AT25080AN-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
AT25160A Ordering Information Ordering Code Package Operation Range AT25160A-10PA-5.0C AT25160AN-10SA-5.0C 8P3 8S1 Automotive (−40°C to 125°C) AT25160A-10PA-2.7C AT25160AN-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
AT25080A/160A/320A/640A AT25320A Ordering Information Ordering Code Package Operation Range AT25320A-10PA-5.0C AT25320AN-10SA-5.0C 8P3 8S1 Automotive (−40°C to 125°C) AT25320A-10PA-2.7C AT25320AN-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
AT25640A Ordering Information Ordering Code Package Operation Range AT25640A-10PA-5.0C AT25640AN-10SA-5.0C 8P3 8S1 Automotive (−40°C to 125°C) AT25640A-10PA-2.7C AT25640AN-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
AT25080A/160A/320A/640A 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 b2 b3 b 4 PLCS Side View L SYMBOL NOM MAX NOTE 2 A – – 0.210 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 3 D1 0.005 – – 3 E 0.300 0.310 0.325 4 E1 0.240 0.250 0.280 3 e 0.100 BSC eA 0.300 BSC L Notes: MIN 0.
PAGE 18
8S1 – JEDEC SOIC C 1 E E1 L N ∅ Top View End View e B COMMON DIMENSIONS (Unit of Measure = mm) A SYMBOL A1 D Side View MIN NOM MAX A 1.35 – 1.75 A1 0.10 – 0.25 b 0.31 – 0.51 C 0.17 – 0.25 D 4.80 – 5.00 E1 3.81 – 3.99 E 5.79 – 6.20 e NOTE 1.27 BSC L 0.40 – 1.27 ∅ 0° – 8° Note: These drawings are for general information only. Refer to JEDEC Drawing MS-012, Variation AA for proper dimensions, tolerances, datums, etc. 10/7/03 R 18 1150 E. Cheyenne Mtn.
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.