Freescale-semiconductor MPC5200B Manuel d'utilisateur Page 284

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 762
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 283
Programmer’s Model
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor 9-19
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
R CW3 SLB3
Rsvd
BRE3
CW2 SLB2 Rsvd
BRE2
CW1 SLB1 Rsvd
BRE1
CW0 SLB0 Rsvd
BRE0
W
RESET:0000000000000000
Bits Name Description
0 CW7 Chip Select 7 Cache Wrap capable, set if peripheral burst can perform PPC cache wrap. This
bit setting only applies in Large Flash or MOST Graphics Mode.
1 SLB7 Chip Select 7 Short/Long Burst, 0 for Short Burst only, 1 for Long Burst capable. Short burst
is 8-bytes, used for Instruction fetches, and CDWF cache line bursts on XLB if cache wrap
not capable. Long Burst capable means that peripheral can do 32-byte burst which hardware
will generate for cache line aligned XLB bursts (and CDWF if peripheral tagged as cache
wrap capable also).
This bit setting only applies in Large Flash or MOST Graphics Mode.
2—Reserved
3 BRE7 Chip Select 7 Burst Read Enable, 1 to enable peripheral bursting for given chip select. Must
be set to enable any Bursting reads.
This bit setting only applies in Large Flash or MOST Graphics Mode.
4 CW6 Chip Select 6 Cache Wrap capable, set if peripheral burst can perform PPC cache wrap. This
bit setting only applies in Large Flash or MOST Graphics Mode.
5 SLB6 Chip Select 6 Short/Long Burst, 0 for Short Burst only, 1 for Long Burst capable. Short burst
is 8-bytes, used for Instruction fetches, and CDWF cache line bursts on XLB if cache wrap
not capable. Long Burst capable means that peripheral can do 32-byte burst which hardware
will generate for cache line aligned XLB bursts (and CDWF if peripheral tagged as cache
wrap capable also).
This bit setting only applies in Large Flash or MOST Graphics Mode.
6—Reserved
7 BRE6 Chip Select 6 Burst Read Enable, 1 to enable peripheral bursting for given chip select. Must
be set to enable any Bursting reads.
This bit setting only applies in Large Flash or MOST Graphics Mode.
8 CW5 Chip Select 5 Cache Wrap capable, set if peripheral burst can perform PPC cache wrap. This
bit setting only applies in Large Flash or MOST Graphics Mode.
9 SLB5 Chip Select 5 Short/Long Burst, 0 for Short Burst only, 1 for Long Burst capable. Short burst
is 8-bytes, used for Instruction fetches, and CDWF cache line bursts on XLB if cache wrap
not capable. Long Burst capable means that peripheral can do 32-byte burst which hardware
will generate for cache line aligned XLB bursts (and CDWF if peripheral tagged as cache
wrap capable also).
This bit setting only applies in Large Flash or MOST Graphics Mode.
10 Reserved
11 BRE5 Chip Select 5 Burst Read Enable, 1 to enable peripheral bursting for given chip select. Must
be set to enable any Bursting reads.
This bit setting only applies in Large Flash or MOST Graphics Mode.
12 CW4 Chip Select 4 Cache Wrap capable, set if peripheral burst can perform PPC cache wrap. This
bit setting only applies in Large Flash or MOST Graphics Mode.
Vue de la page 283
1 2 ... 279 280 281 282 283 284 285 286 287 288 289 ... 761 762

Commentaires sur ces manuels

Pas de commentaire