Hello Everyone,

I am new to microcontroller programming and I am reading the tutorial on the basics of 8051 on 8052.com.

I just have a quick question:

It says that:
"It is important to note that Bit Memory is really a part of Internal RAM. In fact, the 128 bit variables occupy the 16 bytes of Internal RAM from 20h through 2Fh. Thus, if you write the value FFh to Internal RAM address 20h you¡¯ve effectively set bits 00h through 07h. That is to say that:

MOV 20h,#0FFh
is equivalent to:

SETB 00h
SETB 01h
SETB 02h
SETB 03h
SETB 04h
SETB 05h
SETB 06h
SETB 07h""

http://www.8052.com/tutmemor.phtml

Can someone please elaborate on this? I am kinda lost on how writting the value FFh to 20h set the bits 00h to 07h.

Thanks in advance,

NITIN