Emerson PMPPC7448 Manuale Utente
5-1
Section 5
System Controller
The Marvell MV64460 is an integrated system controller with a PCI interface and communi-
cation ports for high performance embedded control applications. The MV64460 has a five
bus architecture:
cation ports for high performance embedded control applications. The MV64460 has a five
bus architecture:
• A 64-bit interface to the CPU bus
• A 64-bit interface to DDR SDRAM
• A 32-bit interface to devices
• Two 64-bit PCI/PCI-X interfaces, only PCI0 is used on the PmPPC7448
These interfaces are connected through a crossbar fabric, or central routing unit, which
enables simultaneous operation of the CPU bus, PCI device, and access to memory. The
crossbar fabric contains programmable arbitration mechanisms to optimize device perfor-
mance.
enables simultaneous operation of the CPU bus, PCI device, and access to memory. The
crossbar fabric contains programmable arbitration mechanisms to optimize device perfor-
mance.
The MV64460 communications unit includes the following:
• Three Ethernet ports
• Two multi-protocol serial controllers (MPSC)
• Ten serial DMAs (SDMA)
• Two baud rate generators (BRG)
• I
2
C interface
Figure 5-1:
MV64460 Block Diagram
CPU at 166 MHz
10/100/1000
72-bit at 133 MHz
SCC, TWSI
64-bit at 133 MHz
CPU Interface
+ 2 Mb SRAM
4 DMA
2 XOR
GPIO, SCC,
TWSI, Int,
Timers
3 Ports Gb
Ethernet +
FIFO Interface
PCI-x
DDR/
FCRAM
PCI-x
Device
32-bit at 133 MHz
64-bit at 133 MHz