The Education of MassiveProng (Pt 3 of 275) (001/634) (127/634)

connected to slave 1204 via lines 1231. Internal bus controller 1206
provides subtractive decode DEVSEL# assertion. Address decoding for
slave devices connected to the internal bus 904 is performed by those
devices.

In FIG. 15 DMA circuitry in PPU 110 is shown in more detail. Bus
arbiter 906 receives bus request signals from bus 104 via two pins
REQ0# and REQ1#, and supplies bus grant signals to bus 104 via two
pins GNT0# and GNT1#. Since bus master 1202 in bus interface 902 is
on-chip in the PPU 110, the arbiter 906 has two more lines REQ2# and
.

Relevant Pages

  • Re: ATA driver for PXA27x (CE5.0)
    ... In that case you set up the registry for the disk to load as a built-in ... device on the internal bus at the address it's using and the IRQ it uses. ... The ATAPI DMA support assumes a bus mastering DMA on the controller. ...
    (microsoft.public.windowsce.platbuilder)
  • The Education of MassiveProng (Pt 3 of 275) (001/634) (103/634)
    ... FIG. 11 the internal bus 904 is suitably clocked at half or a quarter ... and higher or lower frequency relationships ... PPU 110 acts as a bus 104 bus master during DMA cycles for ...
    (sci.electronics.design)
  • Re: PCI calculation
    ... these registers are simply telling the arbiter that every time the ... the bus for MIN_GNT, so set the latency timers and arbitration priority ... When does the device de-assert REQ? ... No, it gets GNT#, *then it can have the bus. ...
    (sci.electronics.design)
  • Re: PCI calculation
    ... is suggesting to the arbiter that when it wants service it needs ... these registers are simply telling the arbiter that every time the ... the bus for MIN_GNT, so set the latency timers and arbitration priority ... When does the device de-assert REQ? ...
    (sci.electronics.design)
  • Re: PCI calculation
    ... It describes how fast this device wants service after it asserts REQ#. ... bus arbiter uses this information to adjust priority. ... Lets suppose the bus is making the peripheral wait every MAX_LAT. ...
    (sci.electronics.design)
Quantcast