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8-bit CPU core

Simplified instruction set, 8-level deep hardware stack

The CPU has dual clocks and can switch between high/low frequency clocks in the system

Under the high-frequency clock of the system, the FCPU can be configured as FHOSC with 4/8/16/32/64/128/256 frequency division

Under the low-frequency clock of the system, the FCPU is fixed to FLOSC with a frequency division of 2

Program memory

2K × 16 bit OTP type program memory, which can read program memory contents through indirect addressing

Data storage: 256 byte SRAM type general-purpose data storage, supporting multiple addressing methods such as direct addressing and indirect addressing

2 groups with a total of 14 I/O ports P0 (P00~P05), P1 (P10~P17)

All ports support Schmitt input and push-pull output

P00/P01/P13 can choose push-pull or open drain output, and support 5V tolerance. P13 can be reused as an external reset RST input and programmed as a high-voltage VPP input

P00/P01 can be reused as external clock oscillator input/output

All ports are equipped with built-in pull-up and pull-down resistors, which can be individually enabled

P16/P17 are high current ports with 4 selectable output currents, while the other ports have 2 selectable output currents. Among them, P00 supports high current output with current injection

P11/P12 can be reused as external interrupt inputs and support external interrupt wake-up function

All ports of P1 support keyboard interrupt wake-up function and can be individually enabled