MIKROE-2267

Page 1 of 2 Flash 2 click From MikroElektonika Documentation Flash 2 click Flash 2 click carries Microchip’s SST26VF064B flash-memory module with 8 MB capacity. It’s a highly reliable module with a specified minimum of 100,000 write cycles and with over 100 years of Data Retention. For data security, the module features a One-Time Programmable (OTP) 2 KB bit secure ID and a 64 bit unique, factory pre-programmed identifier. Additional software security measures include inidividual-block write Protection with permanent lock-down capability. Flash 2 click communicates with the target MCU through the mikroBUS™ SPI interface (CS#, SCK, MISO, MOSI) with additional functionality provided by the #HOLD pin (in place of default mikroBUS™ RST pin). The board is designed to use a 3.3V power supply. Features and usage notes The SST26VF064B/064BA memory array is organized in uniform, 4 KByte erasable sectors with the following erasable blocks: Flash 2 click - Eight 8 KB parameter - Two 32 KByte overlay - One-hundred twenty-six 64 KByte overlay blocks Schematic also available in PDF (http://cdndocs.mikroe.com/images/9/96/SchematicFlash_2_click_v100.pdf) IC/Module Microchip SST26VF064B (http://ww1.microchip.com/downloads/en/DeviceDoc/20005119G.pdf) Interface SPI (MISO, MOSI, SCK), CS, #HOLD Power 3.3V supply The #HOLD pin temporarily Website www.mikroe.com/click/flash-2 (http://www.mikroe.com/click/flash-2) stops serial communication with the SPI Flash memory while the device is selected. This pin only works in SPI, single-bit and dual-bit Read mode and must be tied high when not in use. The manufacturer's data sheet has more information about the memory protection features of the chip: "SST26VF064B/064BA offers flexible memory protection scheme that allows the protection state of each individual block to be controlled separately. In addition, the Write-Protection Lock-Down register prevents any change of the lock status during device operation. To avoid inadvertent writes during power-up, the device is write-protected by default after a power-on reset cycle. A Global Block Protection Unlock command offers a single command cycle that unlocks the entire memory array for faster manufacturing throughput." Programming This snippet initializes all necessary pins and functions for using Flash 2 Click, and performs a test by writing test values to the click, and then reading them back to the user through UART communication. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 #include #include "flash_2_hw.h" sbit FLASH_2_WP at GPIOA_ODR.B0; sbit FLASH_2_CS at GPIOD_ODR.B13; sbit FLASH_2_HLD at GPIOC_ODR.B2; int main(void) { uint8_t buffer[4] uint16_t count uint32_t address uint8_t receive_buffer[4]; char tmp[20]; = {15,20,25,30}; = 4; = 0x0100F0; GPIO_Digital_Output( &GPIOA_BASE, _GPIO_PINMASK_0 ); GPIO_Digital_Output( &GPIOC_BASE, _GPIO_PINMASK_2 ); GPIO_Digital_Output( &GPIOD_BASE, _GPIO_PINMASK_13 ); SPI1_Init_Advanced( _SPI_FPCLK_DIV64, _SPI_MASTER | _SPI_8_BIT | _SPI_CLK_IDLE_LOW | _SPI_FIRST_CLK_EDGE_TRANSITION | _SPI_MSB_FIRST | _SPI_SS_DISABLE | _SPI_SSM_ENABLE | _SPI_SSI_1, &_GPIO_MODULE_SPI3_PC10_11_12 ); Delay_ms(300); UART1_Init(9600); Page 2 of 2 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 } Delay_ms(300); UART1_Write_Text( "Initializing Flash 2 click... " ); UART1_Write_Text( "\r\n" ); flash_2_init(); Delay_ms(300); flash_2_global_block_unlock(); Delay_ms(400); flash_2_write( address, buffer, count ); flash_2_read( address, receive_buffer, count ); UART1_Write_Text( "Initial Values: " ); while( count-- ) { ByteToStr( buffer[count], tmp ); UART1_Write_Text( tmp ); } UART1_Write_Text( "\r\n" ); count = 4; UART1_Write_Text( "Received Values: " ); while( count -- ) { ByteToStr( receive_buffer[count], tmp ); UART1_Write_Text( tmp ); } UART1_Write_Text( "\r\n" ); return; Code examples that demonstrate the usage of Flash 2 click with MikroElektronika hardware, written for mikroC for ARM, AVR, dsPIC, FT90x, PIC and PIC32 are available on Libstock (http://libstock.mikroe.com/projects/view/1785/flash-2-click). Resources - Microchip SST26VF064B data sheet (http://ww1.microchip.com/downloads/en/DeviceDoc/20005119G.pdf) - Flash 2 click examples on Libstock (http://libstock.mikroe.com/projects/view/1785/flash-2-click) - This NAND, NOR that NAND (http://learn.mikroe.com/this-nand-nor-that-nand/), artile about Flash 2 click on learn.mikroe.com - mikroBUS standard specifications (http://download.mikroe.com/documents/standards/mikrobus/mikrobus-standard-specification-v200.pdf) Retrieved from "http://docs.mikroe.com/index.php?title=Flash_2_click&oldid=315" ◾ This page was last modified on 18 May 2016, at 19:43. ◾ Content is available under Creative Commons Attribution unless otherwise noted. http://docs.mikroe.com/index.php?title=Flash_2_click&printable=yes 6/15/2016