Sc92F8003 domestic 51 single-chip microcomputer-CodePudding

1. Register address is like this C1H @ FFH what this says this register address,
2. This register there is no definition in library header files, I want to define the type of SFR, whether know the address of the register can define
3. The chip I how to switch the system clock, external crystals into internal high-speed crystals

CodePudding user response:

refer to the original poster yjx774173329 response:

1. Like the register address is C1H @ FFH what this says this register address,
2. This register there is no definition in library header files, I want to define the type of SFR, whether know the address of the register can define
3. The chip I how to switch the system clock, external crystals into internal high-speed crystals

Read the chip data, the following is my understanding, for your reference,
1. OP_CTM0 the register address is C1H, in special function register area;
2. The SFR operation instructions in the data, on page 12 page 13, should be can't use the keyword SFR definition;
3. Put ENXTL 0 can enable internal 16 MHZ HRC, a legend in page 22,

CodePudding user response:

Although the problem solved, still thank you very much for your answer, the op at the beginning of the register more than one, is a special register, not directly SFR operation, but its mapping two call OPINX (address) and OPREG (assignment) to operate the registers