ghansham.eln
Newbie level 2
Why use PENABLE in APB?
Hi,
As per AMBA bus specification; in APB, PSELx is used for selecting the slaves on APB bus and PENABLE is ued to indicate second cycle of an APB transfer.
Can't we use only PSELx signal for read or write transfer? PSEL signal can select the device and perform the APB transfer. Why to use PENABLE signal just to indicate second cycle?
Specs say that 'This strobe signal is used to time all accesses on the peripheral
bus'. What does that mean?
regards,
Ghanasham.
Hi,
As per AMBA bus specification; in APB, PSELx is used for selecting the slaves on APB bus and PENABLE is ued to indicate second cycle of an APB transfer.
Can't we use only PSELx signal for read or write transfer? PSEL signal can select the device and perform the APB transfer. Why to use PENABLE signal just to indicate second cycle?
Specs say that 'This strobe signal is used to time all accesses on the peripheral
bus'. What does that mean?
regards,
Ghanasham.