gamersfirst apb

ports, each of which can operate in interrupt mode or DMA mode, in other words, the UART can generate interrupts or DMA requests for data transfer between the CPU and the UART. UART serial port hangs on the APB bus, the APB bus can reach up to 50MHz operating frequency, can achieve the highest 115.2Kbps baud rate communication speed when using the APB clock freq

filter switches into the corresponding PLL circuit to multiply the high frequency clock. The high frequency clock is then divided into the internal modules of the chip. (some modules, such as the inside of the serial port and further frequency divider for re-use)3, PLL:APLL, MPLL, EPLL, VPLLApll:cortex-a8 kernel Msys DomainMpllepll:dsys PSYSVpll:video Video related modules4, s5pv210 clock domain detailed1.6.3.1, Msys domain:ARMCLK: The clock that works for the CPU core, the so-called frequency.

for OLAP BusinessObjects BusinessObjects is an easy-to-use bi tool that allows users to access, analyze, and share data. can apply a variety of data sources: Rdb,erp,olap,excel VBA and open object models can be applied for development customization Ibm DB2 OLAP Server is a powerful multidimensional analysis tool that integrates the Hyperion Essbase OLAP engine with the DB2 relational database. Fully compatible with the Essbase API Data is stored in relational database DB2 with star mode

Problem DescriptionIn Geometry, the problem of track is very interesting. Because in some cases, and the track of point is beautiful curve. For example, with polar coordinate system,ρ=cos3θis like rose,ρ=1−sinθis a cardioid, and so on. Today, there is a simple problem on it which you need to solve.Give a triangleδabc Andab = AC. M is the midpoint of BC. Point P is INΔABC and makes MIN{∠MPB+∠APC,∠MPC+∠APB} maximum. The track of P isγ. Wouldyou Mind Cal

1. Clock source Three different clock sources can do the system clock (SYSCLK):HSI oscillator Clock: high-speed internal clockHSE oscillator Clock: high-speed external clockPLL ClockTwo x two-level clocksLSI (Low speed internal clock): 32kHz low-speed internal RC (LSI RC) Independent watchdog clock Source, RTC can be used for automatic wake-up stop/Standby mode.LSE (Low Speed external clock): 32.768kHz Low SPEED external oscillator (LSE crystal), selectable as RTC (RTCCLK) Clock source

Article 1Article, Explains the basics of SOC design! Address: http://blog.163.com/gene_lu/blog/static/64025421201111872144184/ We skip all the descriptions of arm and directly go to the questions most concerned by engineers.To design an ARM-based SOC, we must first understand an ARM-based SoC structure. Figure 1 shows a typical SOC structure:Figure 1From figure 1, we can understand the basic structure of the SOC: ARM core: arm966e AMBA Bus: AHB +

) to indicate when the entity was created. The APB provides a number of useful interfaces to implement these similar functions. That is, for these entities that implement these interfaces, a common encoding is provided (in layman's words, the specified functionality can be implemented as long as the specified interface is implemented).(1) Audit (Auditing)An entity class implements the Ihascreationtime interface to have creationtime properties. When th

The default operating frequency of the S3C2440 CPU is 12 MHz or 16.9344 MHz. The maximum operating frequency is 12 Mb. The use of the PLL circuit can generate a higher clock speed for the CPU and peripheral devices. The S3C2440 has two PLL: mpll and upll, which are dedicated to upll and USB devices. Mpll is used for CPU and other peripheral devices. Mpll generates three clock frequencies: fclk, hclk, and Plck. Fclk is used for CPU cores, hclk is used for AHB Bus devices (such as SDRAM), and pclk

Screen Interface· I2C bus interface· 12 s bus interface· Two USB host interfaces· A usb device interface· Two SPI Interfaces· SD Interface· MMC Card InterfaceS3C2410A integrates an RTC with calendar functions and a chip clock generator with PLL (mpll and upll. Mpll generates the master clock, enabling the processor to operate at a maximum frequency of 203 MHz. This operation frequency allows the processor to easily run wince, Linux and other operating systems and perform more complex informatio

This series of articles by muge0913 finishing, reprint please note the Source: http://blog.csdn.net/muge0913/article/details/7358731 Chip Architecture The application processor chip of the 16/32-bit CPU is the-bit CPU used by Samsung. Samsung has released both the-bit CPU and-bit memory, which are based on the arm11 architecture and are compatible with hardware pins, it should be said that the general functions are basically the same. The obvious difference is that has 2D/3D hardware accelera

Machine description in board-smartarm3250.c: machine_start (lpc3xxx, "smartarm3250 board with the lpc3250 microcontroller")/* maintainer: Kevin wells, NXP Semiconductors */. phys_io = uart5_base ,. io_pg_offst = (io_p2v (uart5_base)> 18) 0 xfffc ,. boot_params = 0x80000100 ,. map_io = maid, // CPU Io ing entry. init_irq = maid ,. timer = lpc32xx_timer ,. init_machine = smartarm3250_board_init, Machine_end Io ing implements the lpc3250 porting code to map the on-chip I/O space with peripherals,

-20010318 from http://fiddes.net/coldfire/) (uClinux ∞ XIP and shared lib patches from http://www.snapgear.com/) ∞) #2006 4 #23:41:40 CSTProcessor: Atmel AT91M40xxx revision 0Architecture: EB01On node 0 totalpages: 1024Zone (0): 0 pages.Zone (1): 1024 pages.Zone (2): 0 pages.Kernel command line: root =/dev/rom0Calibrating delay loop... 12.97 BogoMIPSMemory: 4 MB = 4 MB totalMemory: 3036KB available (791 K code, 170 K data, 40 K init)Dentry cache hash table entries: 512 (order: 0, 4096 bytes)Inod