中圖分類號(hào)： TN492 文獻(xiàn)標(biāo)識(shí)碼： A DOI：10.16157/j.issn.0258-7998.211418 中文引用格式： 張自豪，趙建中，周玉梅. 基于MIPI規(guī)范的從端D-PHY數(shù)字電路設(shè)計(jì)[J].電子技術(shù)應(yīng)用，2021，47(11)：33-38. 英文引用格式： Zhang Zihao，Zhao Jianzhong，Zhou Yumei. Design of slave D-PHY digital circuit based on MIPI specification[J]. Application of Electronic Technique，2021，47(11)：33-38.
Design of slave D-PHY digital circuit based on MIPI specification
Zhang Zihao1，2，Zhao Jianzhong1，Zhou Yumei1，2
1.Institute of Microelectronics，Chinese Academy of Science，Beijing 100029，China； 2.University of Chinese Academy of Sciences，Beijing 100049，China
Abstract： Based on the MIPI D-PHY version 1.1 specification, a design of slave D-PHY digital circuit is proposed, which is implemented with 4 lanes. In the high-speed mode, the data transfer rate of a single lane supports up to 1.5 Gb/s; in the low-power mode, the data transfer rate of lane 0 is up to 10 Mb/s. In the high-speed mode, the deserialization of the serial data stream is implemented by the analog circuit, and the synchronization detection of the data frame header after deserialization is realized by the digital circuit; the detection of the D-PHY entry code and the data transmission in the low-power mode are asynchronous communication and a kind of asynchronous clock implementation is proposed; SMIC 0.18 μm CMOS process library is used for synthesis, and at the typical process corner, the overall circuit area is 95 061 μm2; the overall power consumption is 4.291 mW, and the power consumption in low power mode is 231.3 μW.
Key words : MIPI；D-PHY；high speed mode；low-power mode；asynchronous clock
0 引言
早在2003年，ARM、諾基亞、德州儀器和意法半導(dǎo)體四家公司就預(yù)見了智能、多媒體手機(jī)的廣闊市場前景，成立了移動(dòng)產(chǎn)業(yè)處理器接口(Mobile Industry Processor Interface，MIPI)聯(lián)盟[1]。目前，所有主要的芯片廠商使用MIPI規(guī)范，所有智能手機(jī)都至少使用一種MIPI規(guī)范。串行顯示接口(Display Serial Interface，DSI)協(xié)議是MIPI聯(lián)盟推出的針對(duì)高速顯示接口的規(guī)范[2]，多用于移動(dòng)終端系統(tǒng)[3]，其特點(diǎn)是高速、靈活和低功耗[4]。DSI協(xié)議架構(gòu)的最低層是物理層(Physical Layer，PHY)，規(guī)范了發(fā)送端(主端)和接收端(從端)通道的電學(xué)特性和通道建立時(shí)的時(shí)序要求[5]。D-PHY規(guī)范是一種常用的兼容DSI協(xié)議的物理層規(guī)范[6]。
