FM8P513 SOT23-6 Only 42 single word instructions All instructions are single cycle except for program branches which are two-cycle 13-bit wide instructions All ROM/EPROM area GOTO instruction All ROM/EPROM area subroutine CALL instruction 8-bit wide data path 5-level deep hardware stack Operating speed: DC-20 MHz clock input DC-100 ns instruction cycle 功能简述：三个按键，控制音量加减、暂停播放、上一首下一首. 所用IC是一个6脚的IC