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Atmel Electronic Components Datasheet

AT21CS01 Datasheet

EEPROM

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AT21CS01
Single-Wire, I/O Powered Serial EEPROM with a
Unique, Factory Programmed 64-bit Serial Number
1-Kbit (128 x 8)
DATASHEET
Features
Low voltage operation
̶ Device is self-powered via 1.7V to 3.6V pull-up voltage on the SI/O line
Internally organized as 128 words of 8 bits each (1-Kbit)
Single-Wire serial interface with I2C protocol structure
̶ Device communication is achieved through a single I/O pin
Standard Speed and High Speed Mode options
̶ 15.4kbps maximum bit rate in Standard Speed Mode
̶ 125kbps maximum bit rate in High Speed Mode
8-byte Page Write or single Byte Writes allowed
Discovery Response feature for quick detection of devices on the bus
ROM Zone support
̶ Device is segmented into four 256-bit zones, each of which can be
permanently made read-only (ROM)
256-bit Security Register
̶ Lower 8 bytes contains a factory programmed, read-only,
64-bit Serial Number that is unique to all Atmel Single-Wire products
̶ Upper 16 bytes are user-programmable and permanently lockable
Self-timed write cycle (5ms max)
Manufacturer Identification support
̶ Device responds with unique value for Atmel as well as density and revision
information
High reliability
̶ Endurance: 1,000,000 write cycles
̶ Data retention: 100 years
̶ IEC 61000-4-2 Level 4 ESD Compliant (±8kV Contact, ±15kV Air Discharge)
Green (Lead-free/Halide-free/RoHS Compliant) package options
̶ 8-lead SOIC, 3-lead SOT23, and 4-ball Thin WLCSP
Die sale options in wafer form and tape and reel
Description
The Atmel® AT21CS01 provides 1,024 bits of Serial Electrically Erasable and
Programmable Read-Only Memory (EEPROM) organized as 128 words of 8 bits
each. The device’s software addressing scheme allows up to eight devices to
share a common Single-Wire bus. The device is optimized for use in many
industrial and commercial applications where low-power and low-voltage
operation are essential. Some applications examples include analog sensor
calibration data storage, ink and toner printer cartridge identification, and
management of after-market consumables. The device is available in
space-saving package options and operates with an external pull-up voltage from
1.7V to 3.6V on the SI/O line.
Atmel-8903A-SEEPROM-AT21CS01-Datasheet_082015


Atmel Electronic Components Datasheet

AT21CS01 Datasheet

EEPROM

No Preview Available !

Table of Contents
1. Pin Descriptions and Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Device Block Diagram and System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Device Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 System Configuration using Single-Wire Serial EEPROMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3. Device Operation and Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Single-Wire Bus Transactions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.1 Device Reset / Power-up and Discovery Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.1.1 Resetting The Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1.1.2 Device Response Upon Reset or Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.2 Interrupting the Device During an Active Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.3 Data Input and Output Bit Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1.3.1 Data Input Bit Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.3.2 Start / Stop Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.3.3 Communication Interruptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.3.4 Data Output Bit Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. Device Addressing and I2C Protocol Emulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Memory Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5. Available Opcodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 EEPROM Access (Opcode Ah). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Security Register Access (Opcode Bh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.3 Lock Security Register (Opcode 2h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.4 ROM Zone Register Access (Opcode 7h). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.5 Freeze ROM Zone State (Opcode 1h) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.6 Manufacturer ID Read (Opcode Ch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.7 Standard Speed Mode (Opcode Dh). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.8 High Speed Mode (Opcode Eh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6. Write Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1 Device Behavior During Internal Write Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2 Byte Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3 Page Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4 Writing to the Security Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.5 Locking the Security Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.5.1 Device Response to a Write Command on a Locked Device . . . . . . . . . . . . . . . . . . . . . . 17
6.5.2 Check Lock Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.6 Setting the Device Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.6.1 Standard Speed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.6.2 High Speed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2
AT21CS01 [DATASHEET]
Atmel-8903A-SEEPROM-AT21CS01-Datasheet_082015


Part Number AT21CS01
Description EEPROM
Maker Atmel
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AT21CS01 Datasheet PDF






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