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PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor
16-1
Chapter 16
AMBA Crossbar Switch (AXBS)
16.1
Introduction
This chapter describes the multi-port crossbar switch (AXBS), which supports simultaneous connections
between six master ports and six slave ports. The AXBS supports a 32-bit address bus width and a 64-bit
data bus width at all master and slave ports.
16.1.1
Block Diagram
shows a block diagram of the crossbar switch.
Figure 16-1. AXBS Block Diagram
16.1.2
AXBS Controller Configuration
The AMBA Crossbar Switch (AXBS) supports six masters running at system frequency. The master data
bus width is 64 bits.
summarizes the crossbar master port assignments and the Master IDs.
Table 16-1. Master Assignments and Master IDs
AXBS Port
AXBS Module
Master ID
M0
Z6 Core
0
Z6 Nexus
8
M1
eDMA
2
M2
Off Platform (MLB)
5
M3
FEC
4
Master
Crossbar Switch
Slave
Master modules
Slave modules
Master
Master
Slave
Slave
. . . .
. . . .
Содержание PXN2020
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