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The 8-bit PIC core MCU SOC chip integrates three main functions in a single chip providing optimal solutions for various fiber module applications. The functional blocks main include a 2.5Gbps Post-Amplifier (PA), a 1.25Gbps burst or continuous mode Laser-Driver (LD), and an 8-bit PIC-core MCU. The PA receives differential signal and performs the quantization amplifications. The LD driver performs the transmit function. The on-chip MCU is the flexibility and versatility of controlling and configurations of fiber module design. The main purpose of the article is that the system digital peripherals design, such as I2C slave for host communication and its associated SFP 2-port RAM, two levels of password protection for SFP 512-byte registers, and I2C master for EEPROM interface, and the access to on-chip 2K program SRAM, and boot ROM code process.

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