T89C51AC2
80000
-/23+
原裝現(xiàn)貨
T89C51AC2
80000
-/23+
原裝現(xiàn)貨
T89C51AC2
2800
QQ975246006/08+
原裝現(xiàn)貨QQ975246006TEL0755-83206583朱素梅
T89C51AC2
80000
-/2024+
原裝現(xiàn)貨
T89C51AC2
3588
-/-
原裝 部分現(xiàn)貨量大期貨
T89C51AC2-EM
1
PLCC44/10+
現(xiàn)金回收.收購(gòu)庫(kù)存
T89C51AC2RL-IM
3000
QFP44P/-
原裝 部分現(xiàn)貨量大期貨
T89C51AC2RLTIM
8000
44VQFP/23+
原廠渠道,現(xiàn)貨配單
T89C51AC2RLTIM
9000
44VQFP/2024+
原廠渠道,現(xiàn)貨配單
T89C51AC2RLTIM
96836
44VQFP/25+
百分百原裝,價(jià)格優(yōu)勢(shì)可提供技術(shù)支持,免費(fèi)送樣品
T89C51AC2RLTIM
9000
44VQFP/22+
原廠渠道,現(xiàn)貨配單
T89C51AC2-RLTIM
8963
44LQFP/22+
只做原裝,現(xiàn)貨庫(kù)存
T89C51AC2-RLTIM
28
-/2021+
備注
T89C51AC2-RLTIM
3000
44VQFP/16+
全新原裝歡迎詢價(jià)
T89C51AC2-RLTIM
10000
44VQFP10x10/-
原裝現(xiàn)貨,可開票,提供賬期誠(chéng)信服務(wù)
T89C51AC2-RLTIM
5200
44LQFP/20+
公司現(xiàn)貨原裝
T89C51AC2-RLTIM
3000
44VQFP/16+
全新原裝歡迎詢價(jià)
T89C51AC2-RLTIM
1054
44VQFP/16+
代理直銷,公司原裝現(xiàn)貨供應(yīng)
T89C51AC2-RLTIM
2500
44LQFP/21+
-
T89C51AC2-RLTIM
8
QFP44P/23+
只售全新原裝
T89C51AC2
Enhanced 8-bit Microcontroller with ...
ATMEL
T89C51AC2PDF下載
T89C51AC2
Enhanced 8-bit Microcontroller with ...
ATMEL [ATMEL Corporation]
T89C51AC2PDF下載
T89C51AC2_01
8-bit MCU with 32K bytes Flash, 10 b...
ATMEL [ATMEL Corporation]
T89C51AC2_01PDF下載
T89C51AC2
8-bit microcontroller with 32K Bytes...
T89C51AC2 PDF下載
T89C51AC2-RLTIM
Enhanced 8-bit Microcontroller with ...
ATMEL
T89C51AC2-RLTIMPDF下載
T89C51AC2-RLTIM
Enhanced 8-bit Microcontroller with ...
ATMEL [ATMEL Corporation]
T89C51AC2-RLTIMPDF下載
T89C51AC2-SLSIM
Enhanced 8-bit Microcontroller with ...
ATMEL
T89C51AC2-SLSIMPDF下載
T89C51AC2-SLSIM
Enhanced 8-bit Microcontroller with ...
ATMEL [ATMEL Corporation]
T89C51AC2-SLSIMPDF下載
T89C51AC2-RLSC-M
8-bit MCU with 32K bytes Flash, 10 b...
ATMEL [ATMEL Corporation]
T89C51AC2-RLSC-MPDF下載
T89C51AC2-RLSE-M
8-bit MCU with 32K bytes Flash, 10 b...
ATMEL [ATMEL Corporation]
T89C51AC2-RLSE-MPDF下載
51開發(fā)板上的晶振的兩個(gè)管腳電壓46.8mv,是不是壞了?cpu是atmel t89c51ac2。max232的11腳t1in電壓5v,晶振的兩個(gè)管腳電壓46.8mv。用atmel flip下載失敗,rs232超時(shí)。用comspy監(jiān)視pc的rs232口,結(jié)果是pc第一次發(fā)送$55,無(wú)接收字節(jié)第二次發(fā)送$55,接收到00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
求救各位高手??!我51的板子是不是壞了?第一次用51的開發(fā)板(atmtel t89c51ac2),按照手冊(cè)用flip下載程序時(shí)rs232超時(shí):有幾個(gè)疑點(diǎn):1。筆記本電腦沒有rs232,所以用了pcmica-rs232的適配器,設(shè)定com2,用comspy能檢測(cè)到發(fā)送字節(jié)。2??赡軉?wèn)題出在板子上,開發(fā)板沒有自帶電源,要求9-12v都可以,我用標(biāo)稱12v的電源空載電壓12.14v,接上板子后12.14v。測(cè)下載端口電壓,用萬(wàn)用表量電源gnd和下載端口(et-download)之間電壓電源gnd和下載端口gnd,rxd, txd, pmod之間電壓是0v,電源gnd到pres口2.0mv。測(cè)下載端口各個(gè)pin之間電壓:gnd到pres的電壓是-8.53vgnd到rxd的電壓是20.7mvgnd到txd的電壓是19.3mvgnd到pmod的電壓是1.7mv測(cè)rs232口各個(gè)pin之間電壓:gnd到vcc的電壓是5v想不到其他檢測(cè)手段了。原理圖是不是我的板子有問(wèn)題了,求救各位高手?。?/p>