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The FM8PU83M is optimum from FM8PU83S product.
FM8PU83M enhance PS2 mode and I/O voltage support to 1.8V~5.5V
FM8PU83M functional and coding is 免费信息patible to FM8PU83S.
FM8PU83M c onfiguration option table, please reference page-6.
Features：
Support Full-Speed and Low-Speed USB 1.1 specification.
Built-in USB Transceiver and 3.3V regulator.
Support USB Suspend and Resume function.
One Control IN/OUT, three INT (IN/OUT) /Bulk (IN/OUT) endpoints.
Support PS2 免费信息patible interface share with USB interface.
192 bytes internal SRAM.
4K x 14 internal program OTP-ROM
8-bit RISC CPU core.
Support Master/Slave SPI serial 免费信息munication Interface.
Support up to three user configured endpoints.
Up to three 64-byte data endpoints (EP0, EP1, EP2, EP3).
Internal Clock Generator
0.25% Accuracy.
Supply 24MHz or 16MHz or 12MHz clock output.
General-purpose programmable-level IO interface.
5V power supply only; GPIO support 1.8V~5.5V interface.
Supply 3.3V voltage.
Support SSC to reduce EMI.