User Manual

ManualsBrandsRainbow Electronics ManualsStorageAT25040

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)

• 8-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 (10 ms max)

• High Reliability

– Endurance: One Million Write Cycles

– Data Retention: 100 Years

• 8-pin PDIP and 8-lead JEDEC SOIC Package

Description

The AT25010/020/040 provides 1024/2048/4096 bits of serial electrically erasable

programmable read only memory (EEPROM) organized as 128/256/512 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 AT25010/020/040 is available in

space saving 8-pin PDIP and 8-lead JEDEC SOIC packages.

The AT25010/020/040 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. The HOLD pin may be

used to suspend any serial communication without resetting the serial sequence.

SPI Serial

Automotive

EEPROMs

1K (128 x 8)

2K (256 x 8)

4K (512 x 8)

AT25010

AT25020

AT25040

SPI, 1K Serial

PROM

Pin Configurations

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

8-pin PDIP

GND

VCC

HOLD

SCK

8-lead SOIC

GND

VCC

HOLD

SCK

Rev. 3259C–SEEPR–06/03

Summary of content (18 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
AT25010/020/040 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 COUT CIN Note: Max Units Conditions Output Capacitance (SO) 8 pF VOUT = 0V Input Capacitance (CS, SCK, SI, WP, HOLD) 6 pF VIN = 0V 1. This parameter is characterized and is not 100% tested. DC Characteristics Applicable over recommended operating range from: TA = -40°C to +125°C, VCC = +2.7V to +5.5V.
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
AT25010/020/040 Serial Interface Description MASTER: The device that generates the serial clock. SLAVE: Because the Serial Clock pin (SCK) is always an input, the AT25010/020/040 always operates as a slave. TRANSMITTER/RECEIVER: The AT25010/020/040 has separate pins designated for data transmission (SO) and reception (SI). MSB: The Most Significant Bit (MSB) is the first bit transmitted and received. SERIAL OP-CODE: After the device is selected with CS going low, the first byte will be received.
PAGE 6
SPI Serial Interface 6 AT25010/020/040 3259C–SEEPR–06/03
PAGE 7
AT25010/020/040 Functional Description The AT25010/020/040 is designed to interface directly with the synchronous serial peripheral interface (SPI) of the 6805 and 68HC11 series of microcontrollers. The AT25010/020/040 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 AT25010/020/040 is divided into four array segments. Top quarter (1/4), Top 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
AT25010/020/040 The AT25010/020/040 is capable of an 8-byte PAGE WRITE operation. After each byte of data is received, the three low order address bits are internally incremented by one; the six high order bits of the address will remain constant. If more than 8 bytes of data are transmitted, the address counter will roll over and the previously written data will be overwritten. The AT25010/020/040 is automatically returned to the write disable state at the completion of a WRITE cycle.
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 AT25010/020/040 3259C–SEEPR–06/03
PAGE 11
AT25010/020/040 RDSR Timing CS 0 1 2 3 4 5 6 7 8 9 10 11 7 6 5 4 12 13 14 15 2 1 0 SCK INSTRUCTION SI SO DATA OUT HIGH IMPEDANCE 3 MSB WRSR Timing CS 0 1 2 3 4 5 6 7 8 9 10 11 7 6 5 4 12 13 14 15 2 1 0 SCK INSTRUCTION SI SO DATA IN 3 HIGH IMPEDANCE READ Timing 11 3259C–SEEPR–06/03
PAGE 12
WRITE Timing CS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 7 6 SCK INSTRUCTION SI BYTE ADDRESS 8 5 4 3 2 1 DATA IN 0 7 6 5 4 3 2 1 0 9TH BIT OF ADDRESS SO HIGH IMPEDANCE HOLD Timing CS tCD tCD SCK tHD tHD HOLD tHZ SO tLZ 12 AT25010/020/040 3259C–SEEPR–06/03
PAGE 13
AT25010/020/040 AT25010 Ordering Information Ordering Code Package AT25010-10PA-5.0C AT25010N-10SA-5.0C 8P3 8S1 Operation Range Automotive (-40°C to 125°C) AT25010-10PA-2.7C AT25010N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 14
AT25020 Ordering Information Ordering Code Package Operation Range AT25020-10PA-5.0C AT25020N-10SA-5.0C 8P3 8S1 Automotive (-40°C to 125°C) AT25020-10PA-2.7C AT25020N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 15
AT25010/020/040 AT25040 Ordering Information Ordering Code Package Operation Range AT25040-10PA-5.0C AT25040N-10SA-5.0C 8P3 8S1 Automotive (-40°C to 125°C) AT25040-10PA-2.7C AT25040N-10SA-2.7C 8P3 8S1 Automotive (-40°C to 125°C) Package Type 8P3 8-pin, 0.300" Wide, Plastic Dual Inline Package (PDIP) 8S1 8-lead, 0.150" Wide, Plastic Gull Wing Small Outline Package (JEDEC SOIC) Options -5.0 Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.
PAGE 16
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 0.150 2 1.
PAGE 17
AT25010/020/040 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 2325 Orchard Parkway San Jose, CA 95131 TITLE 8S1, 8-lead (0.
PAGE 18
Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 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.