 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
TNETV1002IDZHK 数据表(PDF) 45 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
TNETV1002IDZHK 数据表(HTML) 45 Page - Texas Instruments |
|
|
45 / 102 page  MCU Subsystem Functional Overview 35 June 2001 -- Revised December 2002 SPRS180C • Operation -- MCU software has to manage RX/TX events (by interrupt or polling) on MCU queues. Packets could be processed directly in EIM packet memory or could be transferred to general-purpose MCU memory to release descriptors as soon as possible. -- If multicast subscribing/unsubscribing is desired on MCU port, the MCU software has to compute a new value of the logical address hash filter and reprogram it on the ENET. • ENET DMA operations are limited to the 16 KB packet RAM. ENET cannot see the whole MCU memory space. Bits 31--16 of addresses are not significant. • ENET interrupts are grouped into one EIM interrupt. Interrupt status is accessible through the EIM status register. 4.3.2 MCU Universal Asynchronous Receiver/Transmitter (UART) Interfaces The UART modules perform serial-to-parallel conversion on data characters received and parallel-to-serial conversion on data characters transmitted by the processor. 4.3.2.1 UART Modes UART mode supports data transmission and data reception via two 64-word-deep FIFOs. Five different parity types are enabled, with three different stop bit formats. The word length is between 5 and 8, and line break can be generated and detected. The baud rate is generated from the MCU subsystem clock by a programmable divisor. All transmitting parameters can be detected in reception mode by an auto-bauding mechanism that recognizes speed, word size, parity, and the number of stop bits. Software flow control is available in the UART/IrDA when in UART mode. The UART/modem supports both software and hardware flow control when in UART mode. Hardware flow control can reduce the MCU software overhead required to process data interrupts. UART/Modem Mode The UART/modem provides an autobauding mechanism. All operations are controllable either via a software interface or using hardware flow control signals. The UART/Modem provides five external pin signals (multiplexed with GPIO pins): • GPIO09/TX_MODEM: Output - transmit data • GPIO10/RX_MODEM: Input - receive data • GPIO11/CTS_MODEM: Input - clear to send • GPIO12/RTS_MODEM: Output - request to send • GPIO13/DCD_MODEM: Output - data carrier detected The UART/modem features: • Line-break generation and detection • Interrupt system control • Loop-back capabilities for internal test • The autobauding supports speeds between 1200 and 115.2 Kbits/s. • Hardware flow control (DCD, RTS, CTS) |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
