Single chip program TH0 = (65536-50000) / 256; what does it mean?

TL0 = (65536-50000)% 256; What does these two mean? ? Why is it 256, is it fixed? ? ? I know the answer, but I still don't understand. This is online: Standard answer: When the timer 0 is set to mode 1, the count register is 16-bit mode, consisting of two 8-bit registers of 8 bit TH0 and low 8-bit TL0, when the set calculation value is 65536-50000 = 15536 ​​(d) When converting to hexadecimal is 3CB0 (h), at this time, TH0 = 3c, TL0 = B0 is loaded, and many programmers use "TH0 = (65536-50000) / 256, in order to avoid these calculations. ; TL0 = (65536-50000)% 256 "programming, let the microcontroller to calculate the results, then why do you want to intervene 256? In fact, it is not difficult to understand. If you do 10--16, you will know that 256 (d) = 0100 (h), where 01 is high 8-bit data, 00 is the low 8-bit data, popular point How many 256 is 156 in 15536 ​​(d), it is equivalent to high 8 digits, which is the relationship, and the remaining number of stores in the high 8-bit register is 8 digits, and the merchant calculation is TH0 = (65536-50000) / 256; Taking a payment is TL0 = (65536-50000)% 256. Answer: The timer operates in the mode. The counter is 16-bit, and the 16-bit binary can represent 0 ~ 2 ^ 16 (65535), and the counter is counted, one number of plus, first of all, to set its count initial value (Do not set the default 0), if you want to have an interrupt every 50000 times overflow, then the initial value is 2 ^ 16-50000 + 1 = 15536, now put 15536 ​​this initial value into TH0 and TL0, but Since 51 is an 8-bit microcontroller, only 8-bit data can be handled each time, so it is to give TH0 and TL0, 15536/256, respectively, to TH0 and TL0, 15536/256, respectively, 15536% 256 is Low octave is taken out, similar to 25/10 = 2 in decimal. ... .5, the ten digits 2 and the bit 5 are taken out. To put it bluntly, it is a correlation. Read more

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