Summary of Adds security to chips maxim
The DeepCover Security Manager DS3660 by Maxim Integrated offers advanced physical security for sensitive data storage. It features 1KB of nonimprinting memory with selective clearing upon tamper events, low-voltage operation at 1.8V, and an automatic battery backup system that draws only 4µA. The device includes a seconds counter, watchdog timer, temperature sensor, and various tamper detection inputs to protect cryptographic processors and secure equipment in diverse applications like ATMs and smart cards.
Parts used in the DeepCover Security Manager DS3660:
- 1024-Byte Nonimprinting Memory
- Sixty-four Bytes General-Purpose RAM
- External SRAM Control Interface
- On-Chip Programmable Temperature Sensor
- ROC Detector
- Two General-Purpose Tamper-Detect Logic Inputs
- Four Uncommitted Tamper-Detect Comparator Inputs
- Four Window Comparators
- Seconds Counter
- Watchdog Timer
- CPU Supervisor
- NV SRAM Controller
- Crystal Oscillator Tamper Monitoring
Description
The DeepCover Security Manager (DS3660) is a security manager with 1024 bytes of SRAM for the secure storage of sensitive data and the physical tamper-sensing response functions required in cryptographic processors and data security equipment. The low-voltage operation allows the host microprocessor interface and optional external memory to run at a low voltage (1.8V typical).
One of the DS3660’s primary features is the on-chip nonimprinting memory, consisting of eight 128-byte banks incorporating a high-speed, direct-wired clearing function. The 1KB memory is constantly complemented in the background to prevent memory imprinting of data. The DS3660 architecture allows the user to clear selective banks of the memory based upon specified tamper events. In the event of a qualified tamper event, the desired bank(s) of memory are rapidly cleared and a negative bias can be applied to erase external memory.
The DS3660 includes a seconds counter, watchdog timer, CPU supervisor, nonvolatile (NV) SRAM controller, and on-chip temperature sensor. In the event of a primary power failure, an external battery source is automatically switched in to keep the memory, time, and tamper-detection circuitry active. Optionally, an internal 1.8V bias source can be selected to keep a low-voltage SRAM alive.
Key Features
- Memory
- 1024-Byte Nonimprinting Memory with High-Speed Erase
- 64 Bytes General-Purpose RAM (Not Cleared)
- External SRAM Control and Optional Tamper-Event Erasure
- Segmented Tamper-Detection Memory Hierarchy with Programmable Tamper-Event Sources
- Tamper
- On-Chip Programmable Temperature Sensing with Proprietary ROC Detector
- Two General-Purpose Tamper-Detect Logic Inputs
- Four Uncommitted Tamper-Detect Comparator Inputs
- Four Window Comparators with On-Chip Reference Voltage
- Latching and Timestamping of Tamper Events
- Crystal Oscillator Tamper Monitoring
Applications/Uses
- Access-Control Security Systems
- ATMs
- Cryptographic Processors
- E-Commerce Servers
- Gaming Systems
- Network Routers and Switches
- Network Storage Servers
- PIN Pads
- Point-of-Sale Terminals
- Secure Communications
- Set-Top Boxes
- Smart Card Readers
- Software-Defined Radios
Maxim Integrated Products has introduced a security manager for storing sensitive data on-chip.
The 1024 byte of on-chip nonimprinting memory consists of eight 128-byte banks, can be selectively cleared by end users based on user-specified tamper events.
The chip, the DS3660, has an internal 1.8V bias source to power low-voltage external SRAM that can be used to store less critical data, and it is configurable to operate with a low-voltage microprocessor for battery-operated devices.
It is designed to provide tamper detection regardless of the power source. The on-chip battery-backup controller constantly monitors the main power (VCC) and automatically switches to the battery (VBAT) when the main power is too low or not present at all.
Drawing only 4µA (typ) of battery current, the chip is designed to retain critical information and monitor tampers while on battery power.
For more read: Adds security to chips maxim
- What is the primary function of the DS3660?
The DS3660 is a security manager designed to store sensitive data securely and provide physical tamper-sensing response functions. - How much on-chip memory does the DS3660 contain?
The chip contains 1024 bytes of nonimprinting memory organized into eight 128-byte banks. - Can the memory be cleared selectively?
Yes, the architecture allows users to clear selective banks based on specified tamper events. - Does the DS3660 support external memory?
It includes an external SRAM control interface with optional tamper-event erasure capabilities. - How does the device handle power failure?
An external battery source is automatically switched in when primary power fails to keep memory and circuits active. - What is the typical battery current draw?
The chip draws only 4µA of battery current to retain critical information while monitoring for tamper events. - What tamper detection features are included on-chip?
Features include programmable temperature sensing, two logic inputs, four comparator inputs, and window comparators. - Is the DS3660 suitable for battery-operated devices?
Yes, it is configurable to operate with a low-voltage microprocessor and has an internal 1.8V bias source. - What happens during a qualified tamper event?
Desired memory banks are rapidly cleared, and a negative bias can be applied to erase external memory. - Are there applications listed for this security manager?
Yes, uses include ATMs, cryptographic processors, network routers, and point-of-sale terminals.
