SDI 02

Secure Digital Interface 02

RS232; TTL; I2C BUS

SDI 02 English Tech. Manual PDF format.

The SDI 02 is a complete memory cards interface specifically designed for an industrial use and for a direct mounting on automatic machines. The accepted memory cards are the SD (Secure Digital) and the MMC (Multi Media Card), that are the ones actally provided of the best features concerning price, handling and reliability. The SDI 02 is a complete peripheral device, capable to write and read data on the listed memories supports, that must be linked to a master system through a serial communication in different types. A list of proper commands allow the master to exchange data with SDI 02 and let manage this data with typical resources of a disk as the Folders, the Files, the Attributes, the Protections, etc.

The memory card is organized with FAT16 standard and it can be used by any personal computer, as an external removable disk. This really simplify the data transfer and use in fact each PC, provided of memory cards interface, can read, write, copy, open the available files, without any limits.

Some additional features as the presence of a Power Supply Section that acceppts a wide range input, a Plastic Container that speed up the installation and an Optional Real Time Clock that adds a time reference to saved data, complete the product with an optimum price/performance ratio.

The SDI 02 is the suitable component in all the applications where big quantity of data must be managed, up to 2 GigaBytes maximum limit, by using a communication serial line that is normally provided by each automation and control systems, available on the market. The data can be managed only on site and in this condition the interface acts as a memory expansion of the master system or they can be transfer to another system. In the last case the memory card is removed from SDI 02 and then used by any other system capable to manage the FAT16 standard; thus it can be developed applications for data logger, data exchange, configuration, update, production data collection, etc.

The serial communication with the master system can be established through an Asynchronous Line buffered in RS 232 or TTL or alternatively through an I2C BUS Synchronous Line. The selection of the used serial line and of the relative parameters is comfortably executed with a specific Configuration Modality, directly accessible to the final user.

Hardware features of SDI 02, complete of possible options, are listed below:

• Modular plastic container DIN 50022 modulbox, M3 HC53 model
• Overall dimension: 90x53 mm frontal size; 58 mm height
• Weigth 0,084 Kg.
• Mounting on DIN Omega rails DIN 46277-1 and DIN 46277-3
• Connector for memory cards in SD and MMC formats
• Circuit for recognition of memory card Insertion and its Write Protect status
• 1 bicolour LED for visual signalations,driven by firmware with different modalities
• Real Time Clock backed by proper Lithium battery
• 240 bytes of backed SRAM
• Asynchronous communication serial line configurable in RS 232 or TTL
• I2C BUS synchronous communication serial line
• 1 digital output in Open Collector, connected to internal connector
• 2 handy connectors for a fast wiring of:
  • Power supply
  • Communication lines
• Power supply section capable to support also small external loads
• Two different power supply types:
  • 5 Vdc regulated
  • unregulated wide range from 10 to 38 Vdc or from 8 to 24 Vac
• Minimum required power equal to about 0,390 W + memory card consumption
• On board protection against voltage peaks by TransZorb
• Supplied with defualt management Firmware, that supports a complete File System
• Customized firmware and program under specific request of the user
• For specific requirements about functionality and price, please contact directly grifo®

In order to simplify the use of SDI 02 the grifo® has realized a management firmware that speed up the development of the user application program. Generally the firmware allows to use all the hardware resources of the interface through an high level File System; in other words the user doesn't have to interact directly with the described hardware sections, but simply manage the provided commands.
The general features of the firmwares, including possible options, are the following ones:

• Management of memory cards with capacity up to 2 GBytes.
• Memory cards managed as a Disck with FAT16 format.
• Data on disk are organized in Folders and Files, compatible with the most diffused Operating Systems for PC (MS-DOS, Windows, etc.).
• Files and Folders names are managed with 8.3 format (8 characters for name and 3 for extension): the extended names are converted into this format.
• Management of file Attributes either in read and write operations.
• Up to 2 Files contemporaneously managed.
• Management of current Date and Time from optional RTC that are used as a temporal reference for the files.
• Possibility to set and acquire the Real Time Clock (RTC) and all its temporal parameters (hour, minutes, seconds, day, month, year).
• Possibility to write and read the backed SRAM locations in order to keep user data even when power supply is not available and memory card is not inserted.
• Recognition and management of the memory card Insertion.
• Recognition and management of the memory card Write Protect selector.
• Recognition and management of the files Read Only attribute.
• Memory card status visualized by Bicolour LED, that shows up to 5 different condition.
• Complete management of the possible Errors: 12 general and 15 for the disk.
• The errors are managed through specific fields in the communication protocol and proper commands.
• Tens of Commands dedicated to typical requirements of data management (see details in following table).
• The firmware lets the SDI 02 work as a Peripheral device that executes the commands received from an external system.
• All the Commands, and the relative Parameters and Responses, are exchanged through a Communication Line by following a proper logic, physic and electric protocol.
• ASCII communication Logic Protocol specifically designed in order to simplify and speed up the commands execution and the data management.
• Proper modality and Configuration commands allow the user to select the Physic and Electric Protocols, that will be used for communication.
• The provided Electric Protocol are:
  • Asynchronous Serial Line buffered in RS 232 or TTL.
  • I2C BUS Synchronous Serial Line.
• Selectable Physic Protocol for asynchronous serial communication:
  • 4.800, 9.600, 19.200, 38.400, 57.600 or 115.200 Bauds;
  • 8 bits for character;
  • No, Even, Odd Parity;
  • 1 or 2 Stop bits.
  • Hardware (RTS, CTS) or Software (XON, XOFF) communication Handshaking
• Selectable Physic Protocol for I2C BUS synchronous serial communication:
  • Bit Rate from 225 to 460.799 bps;
  • Slave mode;
  • SDI Slave Address range from 00H to FEH with step of 2, equal to 128 different values.
• Serial Network connection through I2C BUS synchronous protocol.
• Medium Speed for data transfer from master to memory card are:
  • 4.000 Bytes/second in Write and 10.000 Bytes/second in Read, with asynchronous serial line at 115.200 Baud
  • 6.000 Bytes/second in Write and 10.000 Bytes/second in Read, with synchronous I2C BUS serial line at 400 KBits/second
• Supplied with Demo Programs that shows and simplify the use of all the commands. One of these can be executed on PC and allows the management of SDI 02 connected through a free RS 232 serial line of computer.
• The interface can be driven even by hand by using any sistem with an asynchronous serial line and a Terminal Emulation program (i.e. a standard PC that executes Hyperterminal).

The SDI 02 firmware can be comfortably used through its rich list of commands that solve the typical data recording problems, as described in the following table:

A C C E S S O R I E S
	CKS AMP 2 Connector KIT Set, 4 pins 4 Female pins + AMP plastic housing for GMB_HR84, etc..
	AMP4 Cable AMP Cable Connector, 4 pins 1 m cable with 4 pins female AMP connector for GMB_HR84, etc..
	CKS AMP 8 Connector KIT Set, 8 pins 8 Female pins + AMP plastic housing for QTP_03, etc..
	AMP8 Cable AMP Cable Connector, 8 pins 1 m cable with 8 pins female AMP connector for QTP_03, etc..
	AMP4+AMP8 Cable Cable Connector AMP 3+3 Vie 0,48 m cable with 3+3 pins female AMP connector for I2C BUS
	EL 12 The EL 12 module is a complete, low cost, power supply with extremely reduced dimension, that can be used in conjunction with grifo® cards as SDI 02, QTP 12, QTP 16Big, QTP 16, QTP 22, QTP 24, QTP G28, etc.

Home Cards Categorical Index