MSC8113 Reference Manual, Rev. 0
14-14
Freescale Semiconductor
Direct Slave Interface (DSI)
In both cases, the host can start its next access (back-to-back accesses) without deasserting
HCS
between accesses. When the DCR[HTAAD] and DCR[HTADT] are both cleared, the host must
ignore the
HTA
value from the start of the access until the DSI drives it to its correct value. The
required delay is defined in the AC characteristics section of the MSC8113 Technical Data sheet.
When the DCR[HTAAD] bit is set and the DCR[HTADT] bits do not equal 00 and if the next
access is not to the same MSC8113, then to prevent contention on
HTA
, the host must wait until
the previous DSI stops driving the
HTA
signal before it accesses the next device. When the
DCR[HTAAD] bit is set and the next access is to the same MSC8113 device, the host must not
start a consecutive access before the
HTA
signal is actively driven high by the previous access.
Figure 14-7. Asynchronous Write Using Dual Strobe Mode
HCS
HCID[0–3]
HD[0–63]
HWBS[0–7]
HRDS
HTA (output)
HA[11–29]
Tri-state output not
HTAAD = 0 and HTADT = 00
HTAAD = 1 and HTADT = 01,10,11
HDST[0–1]
valid value
valid value
valid value
valid value
valid value
valid value
valid value
don’t care
don’t care
don’t care
don’t care
don’t care
don’t care
don’t care
don’t care
don’t care
don’t care
don’t
care
don’t
care
driven by the DSI
Note: The signal timing shown for HWBS[0–7] is for signals that are asserted. Unused signals remain
high (deasserted).
Содержание MSC8113
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Страница 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Страница 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Страница 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Страница 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Страница 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Страница 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Страница 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Страница 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Страница 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Страница 544: ...MSC8113 Reference Manual Rev 0 16 46 Freescale Semiconductor Direct Memory Access DMA Controller ...
Страница 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Страница 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Страница 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Страница 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Страница 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Страница 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Страница 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Страница 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...