Features

• Flexible total solution for applications that combine PS/2 and low-speed USB interface, such as mice, joysticks, and many others
• USB Specification Compliance
  - Conforms to USB specification V1.1
  - Conforms to USB HID specification V1.1
• Supports 1 Low-speed USB control endpoint and 1 interrupt endpoint
• Each endpoint has 8×8 bytes FIFO
• Integrated USB transceiver
• 3.3V regulator output
• External 6MHz or 12MHz ceramic resonator or crystal
• 8-bit RISC microcontroller, with 2K×14 EPROM (000H~7FFH)
• 96 bytes RAM (20H~7FH)
• 6MHz/12MHz internal CPU clock
• 4-level stacks
• Two 8-bit indirect addressing registers
• One 16-bit programmable timer counter with overflow interrupt (shared with PA7, vector 0CH)
• One USB interrupt input (vector 04H)
• HALT function and wake-up feature reduce power consumption
• PA0~PA7 support wake-up function
• Internal Power-On reset (POR)
• Watchdog Timer (WDT)
• 20 I/O ports (including 2-PWM output, PC2, PC3)
• 2 PWM output (PC2, PC3)
• Can produce PWM frequency range from 23Hz to 23kHz
• Built-in 8-bit Analog-to-Digital Converter, (6-channel for internal mode (PB0~PB5), 6-channel for external mode with VHL (PB7) and VRL (PB6)
• 20/28-pin SOP package