| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | S87C552-4BA | Single-chip 8-bit microcontroller | 189K |
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| 2 | S87C552-4BA | Single-chip 8-bit microcontroller | 192K |
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| 3 | S87C552-4BA | 80C51 8-bit microcontroller 8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O | 197K |
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