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爱科技、爱创意、爱折腾、爱极致,我们都是技术控
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主控厂商: Innostor(银灿)
主控型号: IS917-D1 - F/W 81.01.00.00
闪存识别码: 453A95937A57 - SanDisk(闪迪) SDTNQGBMA-016G - 4CE/单通道 [MLC-16K] -> 总容量 = 64GB(SanDisk SDYNQGDMM_064G(453A95937A57))
一、所做的操作:
1、U盘能正常工作,读写也都正常;拆机后,测试38脚本为3.3V高电平;
2、将38脚本接地拉为低电平后插上电脑,出现不能识别U盘,读写灯一直闪烁的问题;
3、拆出短接线后,再次插回电脑,U盘恢复正常;
4、断开38脚本的引线,再次插上电脑,出现不能识别U盘,读写灯一直闪烁的问题;
5、接回断开引线,再次插回电脑,U盘恢复正常;6、断开38脚本的引线,将38悬空,并用10K电阻一端接到3.3V,一端接到flash引脚,后插上电脑,能识别U盘,读取,写入文件均正常;
7、断开38脚本的引线,将38脚接地,并用10K电阻一端接到3.3V,一端接到flash引脚,后插上电脑,能识别U盘,读取,写入文件均正常,写保护开关加入失败;
8、测试45、46、47、48脚在未写入和写入状态时的电压,只出现电压波动,没有出现高低电平的跳变。
9、仔细查看芯片引脚功能,发现23脚本为MODE2/WP,检查电路板发现此盘23脚本直接接地,打算用刀片割开PCB,并将此脚本电压拉至3.3再试,无赖此U盘采用多层板设计,割开此芯片外围铜皮后,仍然不能将23脚本与地线断开,无法进行深入测试。
10、请教有条件的大神,继续努力。
二、相关资料:
1、这是我的台电USB3.0 64G U盘,如图1:
主控厂商: Innostor(银灿)
主控型号: IS917-D1 - F/W 81.01.00.00
闪存识别码: 453A95937A57 - SanDisk(闪迪) SDTNQGBMA-016G - 4CE/单通道 [MLC-16K] -> 总容量 = 64GB(SanDisk SDYNQGDMM_064G(453A95937A57))
2、这是拆机后的图片(附件中有原图),如图2:
3、这是银灿IS917引脚本功能图,如图3:
Pin Name | Pin # | Pull up/Down | Attribute | Description | DAT[7] | 1 | Down | I/O | Flash data bit [7] | DAT[6] | 2 | Down | I/O | Flash data bit [6] | DAT[5] | 3 | Down | I/O | Flash data bit [5] | DAT[4] | 4 | Down | I/O | Flash data bit [4] | VCCQ | 5 | | PWR | 3.3V/1.8V IO Power input | DQS | 6 | Down | I/O | Flash DQS | DVDD12 | 7 | | PWR | 1.2V Core power input | DAT[3] | 8 | Down | I/O | Flash data bit [3] | DAT[2] | 9 | Down | I/O | Flash data bit [2] | DAT[1] | 10 | Down | I/O | Flash data bit [1] | DAT[0] | 11 | Down | I/O | Flash data bit [0] | VCC18O | 12 | | PWR | Regulator 1.8V output | AVDD33O | 13 | | PWR | Regulator 3.3V output | VDD5I | 14 | | PWR | Regulator 5V input | GND | 15 | | GND | GND | LXO | 16 | | PWR | LXO | DVDD12 | 17 | | PWR | 1.2V Core power input | LED_RW | 18 | | I/O | R/W Access LED | DVCC33 | 19 | | PWR | 3.3V IO Power input | LED_U3 | 20 | | I/O | USB Mode LED, tie to GND | MODE[0] | 21 | Down | I | Test mode pin, tie to GND | MODE[1] | 22 | Down | I | Test mode pin, tie to GND | MODE[2] | 23 | Down | I | Test mode pin, tie to GND | RST# | 24 | Up | I | Reset | GND | 25 | | GND | GND | SS_RXP | 26 | | I/O | USB 3.0 differential receive pin positive | GND | 27 | | GND | GND | SS_RXM | 28 | | I/O | USB 3.0 differential receive pin negative | VCC12A | 29 | | PWR | 1.2V analog power input | SS_TXP | 30 | | I/O | USB 3.0 differential transmit pin positive | GND | 31 | | GND | GND | SS_TXM | 32 | | I/O | USB 3.0 differential transmit pin negative | VCC33A | 33 | | PWR | 3.3V analog power input | DP | 34 | | I/O | USB 2.0 differential pin plus | DM | 35 | | I/O | USB 2.0 differential pin minus | GND | 36 | | GND | GND | DVDD12 | 37 | | PWR | 1.2 core power input | WP# | 38 | | O | Flash write protection | CE_3 | 39 | | O | Flash chip enable 3 | CE_2 | 40 | | O | Flash chip enable 2 | CE_1 | 41 | | O | Flash chip enable 1 | CE_0 | 42 | | O | Flash chip enable 0 | VCCQ | 43 | | PWR | 3.3/1.8V IO power | RB# | 44 | Up | I | Flash Ready / Busy Status | CLE | 45 | | O | Flash Channel Command latch | ALE | 46 | | O | Flash Channel Address latch | WE# | 47 | | O | Flash Channel WE# | RE# | 48 | | O | Flash Channel RE#
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