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MCIMX257DVM4 Datasheet(PDF) 7 Page - Freescale Semiconductor, Inc |
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MCIMX257DVM4 Datasheet(HTML) 7 Page - Freescale Semiconductor, Inc |
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7 / 132 page  i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 2 Freescale Semiconductor 7 I2C(3) I2C module Connectivity peripherals Inter-IC Communication (I2C) is an industry-standard, bidirectional serial bus that provides a simple, efficient method of data exchange, minimizing the interconnection between devices. I2C is suitable for applications requiring occasional communications over a short distance between many devices. The interface operates up to 100 kbps with maximum bus loading and timing. The I2C system is a true multiple-master bus, including arbitration and collision detection that prevents data corruption if multiple devices attempt to control the bus simultaneously. This feature supports complex applications with multiprocessor control and can be used for rapid testing and alignment of end products through external connections to an assembly-line computer. IIM IC Identification Module Security The IIM provides the primary user-visible mechanism for interfacing with on-chip fuse elements. Among the uses for the fuses are unique chip identifiers, mask revision numbers, cryptographic keys, and various control signals requiring a fixed value. IOMUX I/O multiplexer Pins Each I/O multiplexer provides a flexible, scalable multiplexing solution: • Up to eight output sources multiplexed per pin • Up to four destinations for each input pin • Unselected input paths are held at constant level for reduced power consumption KPP Keypad port Connectivity peripherals KPP can be used for either keypad matrix scanning or general purpose I/O. LCDC LCD Controller Multimedia peripherals LCDC provides display data for external gray-scale or color LCD panels. LCDC is capable of supporting black-and-white, gray-scale, passive-matrix color (passive color or CSTN), and active-matrix color (active color or TFT) LCD panels. MAX ARM platform multilayer AHB crossbar switch ARM platform MAX concurrently supports up to five simultaneous connections between master ports and slave ports. MAX allows for concurrent transactions to occur from any master port to any slave port. PWM(4) Pulse width modulation Connectivity peripherals The pulse-width modulator (PWM) has a 16-bit counter and is optimized to generate sound from stored sample audio images. It can also generate tones. The PWM uses 16-bit resolution and a 4x16 data FIFO to generate sound. SDMA Smart DMA engine System control The SDMA provides DMA capabilities inside the processor. It is a shared module that implements 32 DMA channels. SIM(2) Subscriber identity module interface Connectivity peripherals The SIMv2 is an asynchronous interface with additional features for allowing communication with smart cards conforming to the ISO/IEC 7816 specification. The SIM is designed to facilitate communication to SIM cards or pre-paid phone cards. SJC Secure JTAG interface System control peripherals The system JTAG controller (SJC) provides debug and test control with maximum security. SLCD Smart LCD controller Multimedia peripherals The SLCDC module transfers data from the display memory buffer to the external display device. SPBA Shared peripheral bus arbiter System control The SPBA controls access to the shared peripherals. It supports shared peripheral ownership and access rights to an owned peripheral. Table 2. i.MX25 Digital and Analog Modules (continued) Block Mnemonic Block Name Subsystem Brief Description |
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