spi sram

used when debugging, and it can do other uses. If the local fault diagnosis, write a small program loaded into the SRAM on the diagnostic board of other circuits, or use this method to read and write on board the Flash or EEPROM. You can also use this method to remove the internal flash read and write protection, of course, the release of read and write protection while Flash content is automatically cleared to prevent malicious software copy. Genera

read the book. The directory provides a basic overview of some information. (Figure 2-1) Generally, introduction is very short and has no content. skip this step. Description, Here is (2-2 ). Next let's take a look at the description: (Figure 2-2) We can get the following basic information: 1. The frequency reaches 72 MHz, and the flash memory in the chip is 128 K and sram20k. 2. Two APB buses (clock) 3. Two 12-bit ADCs are generally carried by MCU, but not by MPU. 4. Peripheral Bus I2C

; 32 MB srom (SRAM/ROM) Bank 1 DCD 0x90800000, 0x48000000, 1; memory control register DCD 0x90900000, 0x49000000, 1; USB Host register DCD 0x90a00000, 0x4a000000, 1; interrupt control register DCD 0x90b00000, 0x4b000000, 1; DMA control register DCD 0x90c00000, 0x4c000000, 1; clock Power register DCD 0x90d00000, 0x4d000000, 1; LCD control register DCD 0x90e00000, 0x4e000000, 1; NAND Flash control register DCD 0x90f00000, 0x4f000000, 1; camera

registerDCD 0x90f00000, 0x4f000000, 1; camera control registerDCD 0x91000000, 0x50000000, 1; UART control registerDCD 0x91100000, 0x51000000, 1; PWM timer registerDCD 0x91200000, 0x52000000, 1; USB device registerDCD 0x91300000, 0x53000000, 1; watchdog timer registerDCD 0x91400000, 0x54000000, 1; IIC control registerDCD 0x91500000, 0x55000000, 1; IIS control registerDCD 0x91600000, 0x56000000, 1; I/O port registerDCD 0x91700000, Zero X 57000000, 1; RTC control registerDCD 0x91800000, 0x58000000

Linux Kernel access to peripheral I/O resources by means of (conversion) 3/15/2009 1:27:34 pmhttp: // export Author: dongasdate: 08-08-02 we know that the default peripheral I/O resources are not in the Linux kernel space (such as SRAM or hardware interface registers). If you need to access the peripheral I/O resources, the address must be mapped to the kernel space before it can be accessed in the kernel space. There are two ways to access peripheral

DCD 0x8c000000, 0x08000000, 32; 32 MB srom (SRAM/ROM) Bank 1 DCD 0x90800000, 0x48000000, 1; memory control register DCD 0x90900000, 0x49000000, 1; USB Host register DCD 0x90a00000, 0x4a000000, 1; interrupt control register DCD 0x90b00000, 0x4b000000, 1; DMA control register DCD 0x90c00000, 0x4c000000, 1; clock Power register DCD 0x90d00000, 0x4d000000, 1; LCD control register DCD 0x90e00000, 0x4e000000, 1; NAND Flash control register DCD 0x

(For Original Articles, please indicate the source. Thank you) Well, there have been too many accounts owed to blogs recently. This type of serialization will continue. Let's talk about the startup code of arm today. I have many friends who write code, but I am confused when starting the arm code. In fact, most of them do not understand the working mechanism of arm. I talked a lot about this serialization, but remember that the first code executed by the arm powered on started from 0x0. No one c

registerDCD 0x90d00000, 0x4d000000, 1; LCD control registerDCD 0x90e00000, 0x4e000000, 1; NAND Flash control registerDCD 0x90f00000, 0x4f000000, 1; camera control registerDCD 0x91000000, 0x50000000, 1; UART control registerDCD 0x91100000, 0x51000000, 1; PWM timer registerDCD 0x91200000, 0x52000000, 1; USB device registerDCD 0x91300000, 0x53000000, 1; watchdog timer registerDCD 0x91400000, 0x54000000, 1; IIC control registerDCD 0x91500000, 0x55000000, 1; IIS control registerDCD 0x91600000, 0x560

two main categories: Static RAM (Ram/sram), SRAM is very fast, is currently read and write the fastest storage device, but it is also very expensive, so only in a demanding place to use, such as the CPU of a buffer, two-level buffer. Another known as Dynamic RAM (Ram/dram), DRAM retains data for a short time and is slower than SRAM, but it is faster

"Go" (GO) how the Linux kernel accesses peripheral I/O resources-static mapping (MAP_DESC) modeHow the Linux kernel accesses peripheral I/O resourcesAuthor:dongasdate:08-08-02We know that the default peripheral I/O resources are not in the Linux kernel space (such as SRAM or hardware interface registers, etc.), and if you need access to the peripheral I/O resources, you must first map its address to kernel space before it can be accessed in kernel spa

stm32f101c8 stm32f101r8 stm32f101v8 stm32f101rb stm32f101vbEnhanced Type: Stm32f103c8 stm32f103r8 stm32f103v8 stm32f103rbstm32f103vb stm32f103ve stm32f103zethe role of the STM32 seriesIntroduction Arm's high-performance "cortex-m3" Core 　　1.25dmips/mhz, and ARM7TDMI only 0.95dmips/mhzBest -in-Class peripherals 　　1μs Dual 12-bit adc,4 megabits per second uart,18 megabits per second spi,18mhz I/O rollover speed　　 Low power consumption 　　 consumes 36mA

modem (BP ). Using a separate dual-CPU solution, the two processor platforms need independent and complete power management systems and their external memory, and their respective software upgrade interfaces (the AP needs to support the bypass and baseband boot guide functions ). The following is the hardware block diagram of the AP and BP separated smart phone of UART interface. Smart phones designed with separate dual-CPU solutions have many problems, such as many components, large area, hig

respectively; The Systick_handler implements the Rt-thread system clock beat count in Board.c. (6) Determine the stm32f407 SRAM size and the end-of-SRAM address in board.h. The STM32F407VG has a total of 192K SRAM (only 128k is accessible and the starting address is 0x20000000). #define STM32_SRAM_SIZE 128#define Stm32_sram_end (0x20000000 + stm32_sram_size * 10

roughly how a basic SRAM chip works. SRAM is the abbreviation for "Static RAM", which is named because it does not disappear when the data is deposited (unlike DRAM dynamic random memory, which must be refreshed in a certain amount of time to keep the data stored therein). An SRAM unit is usually composed of 4-6 transistors, and when the

Download mt7697 chip data, mt7697 design schematic reference Today, I will share with you the mt7697 materials, including the mt7697 design principle diagram, specifications, Datasheet and many other materials. Due to the limited number of words in the article, if you are interested, you can download it from the hacker network technology forum or add a group to obtain: 813238832Link: https://bbs.usoftchina.com/ General descriptionMt7697 is a highly integrated single chip featuring an applicat

The difference between ferroelectric memory and conventional memory.One: Volatile memory includes static memory SRAM and dynamic memory dram.Advantages: Read and write fast, read and write life without restriction times.Disadvantage: Loss of power will lose data.Second: Non-volatile memory now includes EEPROM and Flash, but they are all developed in ROM technology.Advantage: The power-down data will be saved.Cons: Write time is slow (typically every w

1. Some common abbreviations and explanations of ARM MSB: the highest valid bit; LSB: minimum valid bit; AHB: advanced high-performance bus; VPB: a large-scale peripheral bus connecting the peripheral functions of the chip; EMC: external memory controller; Mam: Memory acceleration module; VIC: vector interrupt controller; SPI: full-duplex serial interface; Can: controller LAN, a serial communication protocol; PWM: pulse width modulation; TM: Embedded

Linux kernel Qspi Nor flash related driver file:1. DRIVERS/SPI/SPI.C: Linux SPI General Framework code, down to fit Ti mcspi and TI qspi controller driver.2. Drivers/spi/spi-ti-qspi.c:ti QSPI main controller drive, different platform uses different main control drive3. DRIVERS/MTD/DEVICES/M25P80.C:M25P80.C and

? Similarities: (1) external interface: All kinds of bus and auxiliary circuit interface, (2) processing function: similar instruction function classification; the difference: (1) The number of instructions in the instruction system; (2) instructions Form: The embedded microprocessor uses the thin instruction set (RISC), the general microprocessor uses the complex instruction set (CISC), (3) The processor structure design: The embedded system uses the pipeline structure design; (4) Pro

Dm9000 (a) is a fully integrated, powerful, cost-effective, fast Ethernet MAC controller with a universal processor interface, EEPROM interface, 10/100 phy, and 16 kb SRAM (13 KB as receiving FIFO, 3 kb as the sending FIFO ). It uses a single power supply and is compatible with 3.3 V and 5 v io Interface levels. Dm9000 (a) also supports the media independent interface (media-independent) interface to connect to hpna (home phone-line networking Allianc