SFR details

i have a doubt in SFR. in SFR address for PORT 0 is 0x80; and P0_1=0x81; that means first pin of the port 0. For stack pointer address in the 8051 is 0x81, and how it working with this same address...
SFR Details

Can any one help me in getting the details about the SFRs for LPC2138 Controller
SFR details

i have a doubt in SFR. in SFR address for PORT 0 is 0x80; and P0_1=0x81; that means first pin of the port 0. For stack pointer address in the 8051 is 0x81, and how it working with this same address...
SFR Details

Can any one help me in getting the details about the SFRs for LPC2138 Controller
PS2 connector details

Well i am trying to upgrade my project which has a keyboard like telephone to PS2 keyboard like computers so I tried to understand the concept of PS2 keyboard. It requires only +5Volt and GND and gives...