As per above assembly codes
first, data put in to W-register then put in to portb
my question is the data travels from W-register to portb as a serial data or parallel data
if it is travel as parallel data , it should be eight bus lines. isn't it
if it is serial data it consume eight clock cycle isn't it
please advice
Hi, the data bus is 8-bits wide, thus the data is transferred to portB in one instruction cycle. Serial data is when a byte of data is transferred on one port pin.