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Serial data or parallel data

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PA3040

PA3040

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Code: 
movlw  b'11111111'
movwf  portb

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
 
Last edited:

PORTB is eight bit wide (PORTB.0 .... PORTB.7) so the data from W reg 'travels as parallel' to PORTB in one step.
 
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    SAKU

    SAKU

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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.

MN
 
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    SAKU

    SAKU

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Hi,

Also look at the 'Block Diagram' of the Pic near the beginning of the chips datasheet.

It clearly shows the 8 bit wide Data Bus going to the Ports and other I/O modules.
 

Dear All
Thank you very much for help
I got it
Thanks
 

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