NXP Semiconductors MPC5644A, Reference Manual, Page: 193 / 1735

Multi-Layer AHB Crossbar Switch (XBAR)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 193
Chapter 9
Multi-Layer AHB Crossbar Switch (XBAR)
9.1 Introduction
9.1.1 Overview
This section provides an overview of the multi-layer AHB crossbar switch (XBAR). The purpose of the
XBAR is to concurrently support simultaneous connections between master ports and slave ports. The
XBAR supports a 32-bit address bus width. Only a single data bus width is supported throughout the
design, thus, all master and slave ports have the same data bus width.
The XBAR has five master ports and four slave ports. Figure 9-1 shows a block diagram of the XBAR.
Figure 9-1. XBAR device-specific block diagram
The port mappings are shown in Table 9-1 .
Table 9-1. Master/Slave mappings
Module
Port
Physical master ID
Type Logical number
e200z4 core instruction Master M0 0
e200z4 core Load/Store Master M1 0
e200z4 core Nexus Master M1 8
eDMA Master M4 4
FlexRay Interface Master M6 6
EBI
1
Master M7 7
Crossbar Switch
Master modules
Slave modules
e200z4
(Data/Nexus)
M1
eDMA M4 e200z4
(Instruction)
M0
EBI M7
Flash S0
EBI/CAL S1
SRAM S2
Peripheral
Bridge
S7
FlexRay M6