CY3295 TTBridge, INT pin fail?

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分析不良品时.好几片都是INT pin fail, 但CY3295 TTBridge却能正常进行后续的测试. Data Grid能正常读取资料, Line Drawing能正常画线. 以示波器观察INT pin, device INT pin正常拉low通知TT bridge读取资料. 请问INT pin测试的原理是什么?如何判定pass/fail? PS.无法上传示波器图形, 应该是公司的防火墙挡住了.

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/td-p/659709

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1 解答
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建议请本地的FAE/DFAE进行实际测试看是什么原因导致的。

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/666734

在原帖中查看解决方案

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请问你测试的机台的主控器是哪一款啊?是Automotive Multitouch family 中的一款吗?

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/660253

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Yes, CYAT81688-100AS71.
查data sheet, 只有Self Test可能相关, 提到reset后35ms内, INT pin要拉low.
Touchscreen Test Executive改成只测试INT pin, 测试期间有两次reset, 都reset完成后17ms左右INT pin拉low.但还是判定fail...

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/660269

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请提供一下:使用的cfg文件和MTK工具版本号。

我们先对比一下测试条件,内部先复现你的问题。

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/660354

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Touchscreen Test Executive 1.8.20,CFG与量测到的INT波形如附件

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/660357

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Dear LinglingG_46 :

CFG file应该没问题.量产数百片只有5pcs出现INT fail状况.

会提问主要是因为INT pin以示波器量测波形的确有发出low pulse通知host来读取资料, 但又被判定INT fail, 两种互相矛盾的状况难以厘清, 希望能得知详细的INT pin判定原理与规格, 才能判断是否为测试环境的问题导致误判

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/661459

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建议请本地的FAE/DFAE进行实际测试看是什么原因导致的。

smartconx_target@Q!w2e3r4t5y6u7i8o9p0||/t5/PSoC-4/CY3295-TTBridge-INT-pin-fail/m-p/666734

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