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MSC8113 Reference Manual, Rev. 0
14-20
Freescale Semiconductor
Direct Slave Interface (DSI)
14.3.4.3 Synchronous Single Read Using Dual Strobe Mode
Figure 14-13 shows a synchronous single read access using Dual Strobe mode. The DSI samples
HA[11–29]
,
HDST[0–1]
,
HCID[0–3]
,
HWBE[0–7]
,
HRDE
, and
HBRST
on the first
HCLKIN
rising edge on
which
HCS
is asserted. If the
HCID[0–3]
signals match the CHIPID value, the DSI is accessed.
HRDE
is asserted with
HWBE
and
HBRST
deasserted. When the DCR[RPE] bit is set (see
page 14-29), read access to the memory space (not to the register space) initiates prefetching data
from consecutive addresses in the internal memory space. Assertion of
HTA
indicates that data is
valid and that the host must sample the host data lines and terminate the access. The
HTA
is
asserted earlier when the data for this access is already prefetched to the read buffer.
HTA
is
asserted for one
HCLKIN
cycle and driven to logic 1 in the next cycle. It stops being driven on the
next rising edge of
HCLKIN
. The host can start its next access to the same MSC8113 device
immediately in the next
HCLKIN
rising edge without deasserting
HCS
between accesses. If the next
access is not to the same MSC8113 device, then, to prevent contention on
HTA
, the host must wait
to access the next device until the previous DSI stops driving
HTA
.
Figure 14-13. Synchronous Single Read Using Dual Strobe Mode
HCLKIN
HCS
HBRST
HRDE
HTA (output)
HCID[0–3]
HD[0–63] (output)
HWBE[0–7]
HA[11–29]
HDST[0–1]
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
don’t care
don’t care
Summary of Contents for MSC8113
Page 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Page 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Page 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Page 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Page 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Page 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Page 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Page 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Page 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Page 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Page 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Page 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Page 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Page 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Page 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Page 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Page 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Page 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Page 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Page 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...