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DSP56857 데이터시트(PDF) 56 Page - Freescale Semiconductor, Inc

부품명 DSP56857
상세설명  Digitial Signal Controller
PDF  662 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

DSP56857 데이터시트(HTML) 56 Page - Freescale Semiconductor, Inc

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System Bus Controller
5685X Digital Signal Controller User Manual, Rev. 4
1-24
Freescale Semiconductor
1.5.2.1 System Side Operation
On the system side, the IPBus Bridge operates at core frequency and fully supports pipelined
communication with the core. The bridge acts as a slave device on this bus. The bridge is
responsible for initiating IPBus transactions only per requests initiated by the core, or other
system bus masters.
Figure 1-8. IPBus Bridge Interface With Other Main Components
System Side Operation
1.5.2.2 Peripheral Side Operation
On the peripheral side, the IPBus Bridge accesses various devices through a standard
non-pipelined IPBus interface. Separate bus lines are used for read and write transactions. The
IPBus Bridge also interfaces with an External Memory Interface (EMI) block. The IPBus
operates at half of the core frequency.
IP
IP
X1 DATA
56800E
CORE
416
21
XAB1
CDBR
CDBW
X2 DATA
RAM
1-1/2 PORT
XAB2
XDB2
PROGRAM
RAM
PAB
PDB
16
21
24
32
IPB_RDATA
IPB_WDATA
IPB_ADDR
RAM
IP
IPB_R/W
IP
16
32
24
EMI
INTERFACE
CS
AD
IPBus
BRIDGE
RD
WR



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