![Freescale Semiconductor MCF54455 Скачать руководство пользователя страница 476](http://html1.mh-extra.com/html/freescale-semiconductor/mcf54455/mcf54455_reference-manual_2330541476.webp)
FlexBus
Freescale Semiconductor
20-23
If wait states are used, the S1 state repeats continuously until the chip-select auto-acknowledge unit asserts
internal transfer acknowledge or the external FB_TA is recognized as asserted.
show a read and write cycle with one wait state.
Figure 20-18. Read-Bus Cycle (One Wait State)
Figure 20-19. Write-Bus Cycle (One Wait State)
FB_CLK
FB_R/W
FB_ALE
S0
S1
WS
S2
S3
DATA
FB_TSIZ[1:0]
TSIZ[1:0]
DATA
Mux’d Bus
Non-Mux’d Bus
FB_A[23:0]
ADDR[23:0]
FB_D[31:
X
]
ADDR[31:
X
]
ADDR[31:
X
]
FB_AD[
Y
:0]
ADDR[
Y
:0]
FB_AD[31:
X
]
FB_CS
n
, FB_OE,
FB_BE/BWE
n
FB_TA
S0
FB_CLK
FB_R/W
FB_ALE
FB_OE
S0
S1
WS
S2
S3
DATA
FB_TSIZ[1:0]
TSIZ[1:0]
DATA
Mux’d Bus
Non-Mux’d Bus
FB_A[23:0]
DATA
ADDR[23:0]
FB_D[31:
X
]
ADDR[31:
X
]
ADDR[31:
X
]
FB_AD[
Y
:0]
ADDR[
Y
:0]
FB_AD[31:
X
]
FB_CS
n
, FB_BE/BWE
n
FB_TA
S0
Содержание MCF54455
Страница 33: ...xxviii Freescale Semiconductor ...
Страница 67: ...Freescale Semiconductor 1 ...
Страница 125: ...Freescale Semiconductor 1 ...
Страница 145: ...Enhanced Multiply Accumulate Unit EMAC 5 21 Freescale Semiconductor ...
Страница 173: ...Cache 6 28 Freescale Semiconductor ...
Страница 179: ...Static RAM SRAM 7 6 Freescale Semiconductor ...
Страница 207: ...Power Management 9 16 Freescale Semiconductor ...
Страница 323: ...Reset Controller Module 13 8 Freescale Semiconductor ...
Страница 389: ...Pin Multiplexing and Control 16 44 Freescale Semiconductor ...
Страница 575: ...PCI Bus Controller 22 58 Freescale Semiconductor ...
Страница 600: ...Advanced Technology Attachment ATA Freescale Semiconductor 23 25 ...
Страница 601: ...Freescale Semiconductor 1 ...
Страница 842: ...I2 C Interface Freescale Semiconductor 33 16 ...
Страница 843: ...Freescale Semiconductor 1 ...
Страница 921: ...Revision History A 6 Freescale Semiconductor ...