Detailed analysis based on the configuration of the microcontroller memory

On-chip RAM 128 bytes (00H-7FH);

The first 32 units of on-chip RAM are the working register area (00H—1FH)

The on-chip RAM has 128 bit-addressable bits, which occupy 16 cells.

The bit address number is: 00H—7FH, distributed in the 20H—2FH unit (P.27)

Among the 21 special function registers (SFRs) on the chip: bits in the SFR whose address number can be divisible by 8 can also be bit-bit addressed (P.27-28)

Addressable off-chip RAM 64K bytes (0000H-FFFFH)

Addressable off-chip ROM 64K bytes (0000H-FFFFH)

On-chip ROM 4K bytes (000H-FFFH)

Further reading: Semiconductor Memory

Memory configuration (on-chip RAM)

1, on-chip RAM 128 bytes (00H-7FH)

2. The first 32 units of the on-chip RAM are the working register area (00H—1FH)

3. The first 32 units of the on-chip RAM are the working register area (00H—1FH)

4. There are 128 bits that can be bit-addressed in the on-chip RAM.

Bit address: 00H—7FH

Distributed in: 20H-2FH unit

5. There are 128 bits that can be bit-addressed in the on-chip RAM.

Bit address: 00H—7FH

Distributed in: 20H-2FH unit

6, addressable off-chip RAM 64K bytes (0000H-FFFFH);

Addressable off-chip ROM 64K bytes (0000H-FFFFH);

On-chip ROM 4K bytes (000H - FFFH);