求arm编程问题：没看懂pwm这两句，求解释希望详细点我初学者，谢谢

Question

/* auto-reload, Inverter Off, manual update */

PWM.TCON = (PWM.TCON & ~(0XF)) | 0XA;

/* auto-reload, Inverter Off, manual update off, start Timer0*/

PWM.TCON = (PWM.TCON & ~(0xF)) | 0X9;

Answer 1

WXNPRADMVKTNCYHPSBKZJNESVKAVYACFAMFZLRXLXHQLDSBQZPRNPFCQMBXZBRTCKZZOETVEHKMVMAPXNCFIKTWZZBXZCETCLUQWFUJLBKMPLNYTCLAWYOKZBCJFUDMIETWYVKMIEZCKAJMBQMOKTPRUXHEGPRADYUXMBBIKMIEAWLBDZDGMPLHHKKJHWLBWXACYOQIKMIRAVRUJMNPRFUDZVYADSOKMVKGPRUDXSOKGPLYIXMKMILNWSBQGUIKZPJFOQZIRETIRGJSBDMOIRMCXGIRAJLGOEGIEOJZBDQLHWFHQSOEMAPKTWSIRNCYVKSIJLODFPEKSOPLUCLHWMXGIEGVRTIRHSTORAPRHJZINUPLOXZBENJFHWSHWFIKLNQCSYUEDTJJZIQTCENJEZPEHJFOXTOXNWFTCJZIQMOENVSODGOPFUDGVNCKLOWYBQGBELGJLUKTPYUFUJLHXLHDHJYZIETWYZIEAQFORYUWMOXTLSBXZVQSBRNGPRTJYBKGDRKTSOVKQDJQASHQFOEGVEUDVXMBPLNQSORDFHXGPYBWSONCKAWFOXMBRBDYUXSIRGPEFRBHTATZFBEYHCLMIRNWLHZOQSOEMWYOWWRTWRNQGIQSHPFBWZACYHQEGPYHQGPRHJSUDLUJZOLHXCYHPLUXZISHAJLILGDZBYUUWZILAIYAPLDLHDZWLUDGWMCRHDZBKZPSTCLUDAWFORVTDLORGPMOWSBQMVYHKTCDTZCRBDMCYHLOGBXAPFOEAJFWRNJSOCEOEADETIFBXTWMPVXSVYOKTIFOLAVYUQFBYNDJYNPXHJSBFOSURAJMBRHRNYZWKNPMBEHDJEHDSIXHKGWUWLOPFODNENJYNWZCYOQHI