LED drive and keyboard control chip

2. Features ● Set display current drive layer internally, the current of segment is no less than 25mA, the current of word is no less than 160mA. ● Display scan control dynamically, support 8×4 or 7×4, directly drive four bits number LED or thirty two LEDs. ● Internal limit current, set eight

文件：191.02 Kbytes 頁(yè)數(shù)：12 Pages

ETCList of Unclassifed Manufacturers

未分類制造商

DIgItal Drive and Keyboard Controlled Chip

文件：192.38 Kbytes 頁(yè)數(shù)：9 Pages

WCH

沁恒微電子

數(shù)碼管驅(qū)動(dòng)及鍵盤(pán)控制芯片

CH455 是數(shù)碼管顯示驅(qū)動(dòng)和鍵盤(pán)掃描控制芯片。CH455內(nèi)置時(shí)鐘振蕩電路，可以動(dòng)態(tài)驅(qū)動(dòng)4 位數(shù)碼管或者32 只LED；同時(shí)還可以進(jìn)行28 鍵的鍵盤(pán)掃描；CH455 通過(guò)SCL 和SDA 組成的2 線串行接口與單片機(jī)等交換數(shù)據(jù)。 ? 內(nèi)置顯示電流驅(qū)動(dòng)級(jí)，段電流不小于25mA，字電流不小于160mA。\n? 動(dòng)態(tài)顯示掃描控制，支持8×4 或者7×4，直接驅(qū)動(dòng)4 位數(shù)碼管或者32 只發(fā)光管LED。\n? 內(nèi)部限流，通過(guò)占空比設(shè)定提供8 級(jí)亮度控制。\n? 內(nèi)置28 鍵鍵盤(pán)控制器，基于7×4 矩陣鍵盤(pán)掃描。\n? 內(nèi)置按鍵狀態(tài)輸入的下拉電阻，內(nèi)置去抖動(dòng)電路。\n? 提供低電平有效的鍵盤(pán)中斷，提供按鍵釋放標(biāo)志位，可供查詢按鍵按下與釋放。\n? 高速2 線串行接口，時(shí)鐘速度從0 到4MHz，兼容兩線I2C 總線，節(jié)約引腳。\n? 內(nèi)置上電復(fù)位，支持2.7V～5V 電源電壓。\n? 支持低功耗睡眠，節(jié)約電能，可以被按鍵喚醒或者被命;

WCH

沁恒微電子

LED drive and keyboard control chip

2. Features ● Set display current drive layer internally, the current of segment is no less than 25mA, the current of word is no less than 160mA. ● Display scan control dynamically, support 8×4 or 7×4, directly drive four bits number LED or thirty two LEDs. ● Internal limit current, set eight

文件：191.02 Kbytes 頁(yè)數(shù)：12 Pages

ETCList of Unclassifed Manufacturers

未分類制造商

LED drive and keyboard control chip

2. Features ● Set display current drive layer internally, the current of segment is no less than 25mA, the current of word is no less than 160mA. ● Display scan control dynamically, support 8×4 or 7×4, directly drive four bits number LED or thirty two LEDs. ● Internal limit current, set eight

文件：191.02 Kbytes 頁(yè)數(shù)：12 Pages

ETCList of Unclassifed Manufacturers

未分類制造商

LED drive and keyboard control chip

2. Features ● Set display current drive layer internally, the current of segment is no less than 25mA, the current of word is no less than 160mA. ● Display scan control dynamically, support 8×4 or 7×4, directly drive four bits number LED or thirty two LEDs. ● Internal limit current, set eight

文件：191.02 Kbytes 頁(yè)數(shù)：12 Pages

ETCList of Unclassifed Manufacturers

未分類制造商

DIgItal Drive and Keyboard Controlled Chip

文件：192.38 Kbytes 頁(yè)數(shù)：9 Pages

WCH

沁恒微電子

DIgItal Drive and Keyboard Controlled Chip

文件：192.38 Kbytes 頁(yè)數(shù)：9 Pages

WCH

沁恒微電子

DIgItal Drive and Keyboard Controlled Chip

文件：192.38 Kbytes 頁(yè)數(shù)：9 Pages

WCH

沁恒微電子