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CryptoMemory® Full Specification
CryptoMemory® Devices
Features
1 Pin Configuration and Package Information
1.1 Pin Configuration
1.2 Package Information
2 Description
2.1 Embedded Applications
2.2 Smart Card Applications
2.3 Scope and Purpose of This Document
3 Pin Description
3.1 Supply Voltage (VCC)
3.2 Clock (SCL/CLK)
3.3 Serial Data (SDA/IO)
3.4 Reset (RST)
4 Detailed Description
4.1 User Memory
4.2 Control Logic
4.3 Configuration Memory
5 Communication Security Modes
5.1 Security Operations
5.2 Data Protection Features
5.3 Configuration Memory Values
5.4 Security Fuses
6 Protocol Selection
6.1 Synchronous Mode for Embedded Applications
6.2 Asynchronous Mode for Smart Card Applications
7 Synchronous Protocol
7.1 Start-up Sequence
7.2 Command Set
7.3 Command Format
7.4 Acknowledge Polling
7.5 Device Addressing
7.6 Command Descriptions
8 Synchronous Initialization Example
8.1 Write Data to User Zones
8.2 Unlock the Configuration Memory
8.3 Write Data to the Configuration Memory
8.4 Set Security Fuses
9 Asynchronous T=0 Protocol
9.1 Character Format
9.2 Command format
9.3 PPS Support
9.4 Command Set
10 Asynchronous Initialization Example
10.1 Write Data to User Zones
10.2 Unlock the Configuration Memory
10.3 Write Data to the Configuration Memory
10.4 Set Security Fuses
11 Absolute Maximum Ratings*
11.1 DC and AC Characteristics
11.2 Timing Diagrams for Synchronous Communications
12 DC Tamper Detection Limits
12.1 High Voltage and Low Voltage Limits
12.2 Minimum Clock Pulse
12.3 Maximum Clock Frequency
12.4 Power-On Reset (POR) Delay
12.5 Noise Suppression
13 Ordering Information
14 Package Marking Information
14.1 Package Drawings
15 Revision History
Microchip Information
Trademarks
Legal Notice
Microchip Devices Code Protection Feature

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