SDRAM Controller (SDC)
18-82
ADSP-BF535 Blackfin Processor Hardware Reference
Table 18-19. Throughput for Accesses to 32-Bit Wide SDRAM
Accesses
Read/Write
Page Hit/Miss
1
Throughput
L1 Cache Line Fill
(
5 word Read Buffer Hit)
Read
Page Hit
8 words/8 cycles
L1 Cache Line Fill
(N word Read Buffer Hit, where
N < 5)
Read
Page Hit
N word hit: 8
words/(13-N) cycles
L1 Cache Line Fill
(Read Buffer Miss)
Read
Page Hit
8 words/13 cycles
L1 Cache Copyback
Write
Page Hit
8 words/16 cycles
DMA Burst Read (4 words)
Read
Page Hit
4 words/9 cycles
DMA Burst Write (4 words)
Write
Page Hit
4 words/8 cycles
DMA Burst Read (8 words)
Read
Page Hit
8 words/13 cycles
DMA Burst Write (8 words)
Write
Page Hit
8 words/16 cycles
Single Read
Read
Page Hit
1 word/6 cycles
Single Write
Write
Page Hit
1 word/2 cycles
L1 Cache Line Fill
(Read Buffer Miss)
Read
Page Miss
8 words/17 cycles
L1 Cache Copyback
Write
Page Miss
8 words/20 cycles
DMA Burst Read (4 words)
Read
Page Miss
4 words/13 cycles
DMA Burst Write (4 words)
Write
Page Miss
4 words/12 cycles
DMA Burst Read (8 words)
Read
Page Miss
8 words/17 cycles
DMA Burst Write (8 words)
Write
Page Miss
8 words/20 cycles
Single Read
Read
Page Miss
1 word/10 cycles
Single Write
Write
Page Miss
1 word/6 cycles
1 Page Miss Penalty = t
RP
+ t
RCD
Содержание ADSP-BF535 Blackfin
Страница 80: ...Development Tools 1 26 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 312: ...Working With Memory 6 86 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 332: ...System Interfaces 7 20 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 360: ...Dynamic Power Management Controller 8 28 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 446: ...Beginning and Ending an SPI Transfer 10 40 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 522: ...Timing Examples 11 76 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 562: ...IrDA Support 12 40 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 608: ...PCI I O Issues 13 46 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 672: ...References 14 64 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 810: ...SDRAM Controller SDC 18 86 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 811: ...ADSP BF535 Blackfin Processor Hardware Reference 18 87 External Bus Interface Unit...
Страница 812: ...SDRAM Controller SDC 18 88 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 860: ...DMA Bus Debug Registers 20 30 ADSP BF535 Blackfin Processor Hardware Reference...
Страница 908: ...SDRAM Controller External Bus Interface Unit B 36 ADSP BF535 Blackfin Processor Hardware Reference...