Backup Boot Flash Tools (BBF): Introduction

Transcription

1 Dec 08

2 Backup Boot Flash Tools (BBF): Introduction The Backup Boot Flash (BBF) is an innovative SPI tool created by DediProg to force the application controller to work (read, program, update..) on the backup memory inserted in the BBF Tool socket and no more on the main memory soldered on board. Actually, the main Serial Flash is disabled automatically by the BBF tool so that the application controller communicates with the Backup flash instead of the Main Serial Flash. 2

3 Backup Boot Flash Tools (BBF): Benefits Software development: This tool offers the highest flexibility for software development as the Serial Flash can be easily changed in the socket with different parts, suppliers, densities and also easily updated with different codes by connecting our SF100 programmer. Software engineers can perform different trials in a very short time without unsoldering the Main Serial Flash from the board. Our BBF tool is working with most of the application in the market using Serial Flash as the only hardware requirement is a pull-up resistor on the Hold pin (most of the design). Computer Repairing: The BBF tool can be used to make the computer boot on the backup memory in case of corrupted Bios in the main memory soldered on the motherboard. After Boot, the Flash utility tool of the computer can be used to update the corrupted memory and fix the computer (for more information on this method, please refers to our dedicated Application note: AN0106). 3

4 Backup Boot Flash Tool (BBF) Description The BBF are composed of: One or Two sockets to insert the Backup Serial Flashes (SO8N, SO8W, SO16W). One application Pin header to connect different type of cables to the applications. One Programmer cable to connect the BBF tool to the SF100 programmer and update or read the Backup Flashes content inserted in the sockets (cannot update the application memory directly). One Switch to enable the Backup memory and disable the main Serial Flash on application board. One LED to indicate the BBF status (ON or OFF). 4

5 Connections to the Application with Test Clip (S08N, SO8W, SO16W) The BBF SO Test Clip is used to connect the BBF tool directly on the Main Serial Flash package soldered on the application board. This solution offers the advantage to be compliant with all the application using the Serial Flash in SO packages (SO8N, SO8W, SO16) without any hardware modification. Actually the main Serial Flash is kept soldered on board and is used to connect the BBF tool to the SPI bus (no need of application connector). Single Flash Dual Flashes In case of dual flashes, The first is connected With the SO Test clip And the second is Connected with the Two Individual test clips (CS2 and Hold2) 5

6 Connections to the Application with 2.54mm Pitch Connector (all BBF) To offer an easy and safe connection, the application can be Designed with a 2.54mm BBF pin header connector. DediProg is proposing a standard reference pin-out connector adapted to each BBF tool (SO8N,SO8W or SO16W single socket). Single Flash Connector (top view) 1 CS Vcc 2 3 MISO Hold 4 5 X CLK 6 7 GND MOSI 8 Dual Flashes Connector (top view) 1 Hold2 CS2 2 3 CS1 Vcc 4 5 MISO Hold1 6 7 X CLK 8 9 GND MOSI 10 Pins 5 or 7 (NC) can be used as mistake proof pin 6

7 Connections to the Application with SMT 1.27mm Connector (SO8) In case, the application board has not been designed with a BBF connector, DediProg is proposing a innovative solution to offer a better contact stability versus the SO Test Clip fixed on the Main Serial Flash package. The 1.27mm SMT connector can be soldered in place of the Main Serial Flash on board as they have the same footprint and the BBF can be connected with the appropriate cable. Single Flash Dual Flashes This solution is recommended if lot of trials have to been performed on the same board. 7

8 Update the Backup Boot Flash with the SF100 Programmer The Backup Boot Flashes can be easily changed for different parts, densities or suppliers. The Backup Serial Flash code can also be updated easily by connecting our SF100 programmer. The programmer can update the two Backup Serial Flashes inserted in the sockets by selecting the target one in the DediProg software: 8

9 Application Hardware Requirement Hold pin driven High trough pull up in the application board Common SPI bus in case of dual Serial Flashes Fig1: Application schematic with Dual Flashes: 9

10 How to use it?

11 With BBF enabled, Application Works on the Backup Flash Inserted in the Socket BBF Switched ON switch Backup Serial Flash Enabled SOCKET BBF tool Read, update SO8N SO8W SO16 Application Controller Main Serial Flash Disabled 11

12 With BBF disabled, Application Works on the on board Flash BBF Switched OFF switch Backup Serial Flash Disabled BBF tool SOCKET Read, update SO8N SO8W SO16 Application Controller Main Serial Flash Enabled 12

13 Update the Backup Flash with the SF100 Programmer BBF Switched ON USB SF100 Programmer Read, update Backup Serial Flash Enabled BBF tool SOCKET Computer Conflict smart management SF100/Application Read, write SO8N SO8W SO16 Backup Flash is isolated from the application during the programming operation duration Application Controller Main Serial Flash Disabled 13

14 Application Protection BBF Switched OFF USB Backup Serial Flash Disabled SF100 SOCKET Computer Programmer Programmer cannot access application memory to avoid conflict BBF tool Read, update SO8N SO8W SO16 Application Controller Main Serial Flash Enabled 14

15 BBF Connections BBF tool Test Clip SOCKET 2.54mm connector 1.27mm SMT connector SO8N SO8W SO16 On Serial Flash Package Connector + Serial Flash SMT Connector in place of Serial Flash 15

16 Dual Serial Flashes BBF Switched ON Backup Serial Flashes Enabled SOCKET1 BBF tool SOCKET2 - Vcc, Gnd - CLK, MISO, MOSI - Hold1, CS1 CS2 Common between Both memories Hold2 (only if not common with Hold1) Read, write Application Controller Serial Flash1 Disabled Serial Flash2 Disabled 16

17 DediProg Contacts Jean Christian Martin Garrin: Marketing Director Chong Tsao: Sales Executive DediProg Inc 4F 2, N.16, Jin Jhou St, Taipei, Taiwan, ROC for technical support: for Sale information: