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EFM32GG990F1024-BGA112 Datasheet(PDF) 5 Page - Silicon Laboratories |
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EFM32GG990F1024-BGA112 Datasheet(HTML) 5 Page - Silicon Laboratories |
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5 / 81 page  ...the world's most energy friendly microcontrollers 2014-05-23 - EFM32GG990FXX - d0046_Rev1.30 5 www.silabs.com hold timing. Direct Drive is supported for TFT displays which do not have their own frame buffer. In that case TFT Direct Drive can transfer data from either on-chip memory or from an external memory device to the TFT at low CPU load. Automatic alpha-blending and masking is also supported for transfers through the EBI interface. 2.1.12 Universal Serial Bus Controller (USB) The USB is a full-speed USB 2.0 compliant OTG host/device controller. The USB can be used in Device, On-the-go (OTG) Dual Role Device or Host-only configuration. In OTG mode the USB supports both Host Negotiation Protocol (HNP) and Session Request Protocol (SRP). The device supports both full- speed (12MBit/s) and low speed (1.5MBit/s) operation. The USB device includes an internal dedicated Descriptor-Based Scatter/Garther DMA and supports up to 6 OUT endpoints and 6 IN endpoints, in addition to endpoint 0. The on-chip PHY includes all OTG features, except for the voltage booster for supplying 5V to VBUS when operating as host. 2.1.13 Inter-Integrated Circuit Interface (I2C) The I 2C module provides an interface between the MCU and a serial I2C-bus. It is capable of acting as both a master and a slave, and supports multi-master buses. Both standard-mode, fast-mode and fast- mode plus speeds are supported, allowing transmission rates all the way from 10 kbit/s up to 1 Mbit/s. Slave arbitration and timeouts are also provided to allow implementation of an SMBus compliant system. The interface provided to software by the I 2C module, allows both fine-grained control of the transmission process and close to automatic transfers. Automatic recognition of slave addresses is provided in all energy modes. 2.1.14 Universal Synchronous/Asynchronous Receiver/Transmitter (US- ART) The Universal Synchronous Asynchronous serial Receiver and Transmitter (USART) is a very flexible serial I/O module. It supports full duplex asynchronous UART communication as well as RS-485, SPI, MicroWire and 3-wire. It can also interface with ISO7816 SmartCards, IrDA and I2S devices. 2.1.15 Pre-Programmed USB/UART Bootloader The bootloader presented in application note AN0042 is pre-programmed in the device at factory. The bootloader enables users to program the EFM32 through a UART or a USB CDC class virtual UART without the need for a debugger. The autobaud feature, interface and commands are described further in the application note. 2.1.16 Universal Asynchronous Receiver/Transmitter (UART) The Universal Asynchronous serial Receiver and Transmitter (UART) is a very flexible serial I/O module. It supports full- and half-duplex asynchronous UART communication. 2.1.17 Low Energy Universal Asynchronous Receiver/Transmitter (LEUART) The unique LEUART TM, the Low Energy UART, is a UART that allows two-way UART communication on a strict power budget. Only a 32.768 kHz clock is needed to allow UART communication up to 9600 baud/ s. The LEUART includes all necessary hardware support to make asynchronous serial communication possible with minimum of software intervention and energy consumption. 2.1.18 Timer/Counter (TIMER) The 16-bit general purpose Timer has 3 compare/capture channels for input capture and compare/Pulse- Width Modulation (PWM) output. TIMER0 also includes a Dead-Time Insertion module suitable for motor control applications. |
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