ppc440ep Applied Micro Circuits Corporation (AMCC), ppc440ep Datasheet - Page 11

• Manufacturer Part Number: ppc440ep
• Description: Powerpc 440ep Embedded Processor
• Manufacturer: Applied Micro Circuits Corporation (AMCC)

Internal Buses
The PowerPC 440EP features five standard on-chip buses: two Processor Local Buses (PLBs), two On-Chip
Peripheral Buses (OPBs), and the Device Control Register Bus (DCR). The high performance, high bandwidth
cores such as the PowerPC 440 processor core, the DDR SDRAM memory controller, and the PCI bridge connect
to the PLBs. The primary OPB hosts lower data rate peripherals. The secondary OPB is dedicated to USB 2.0 and
DMA. The daisy-chained DCR provides a lower bandwidth path for passing status and control information between
the processor core and the other on-chip cores.
Features include:
AMCC Proprietary
440EP – PPC440EP Embedded Processor
• PLB4
• PLB3
• OPB (2)
• DCR
– 128-bit implementation of the PLB architecture
– Separate and simultaneous read and write data paths
– 36-bit address
– Simultaneous control, address, and data phases
– Four levels of pipelining
– Byte-enable capability supporting unaligned transfers
– 32- and 64-byte burst transfers
– 133MHz, maximum 4.25GB/s (simultaneous read and write)
– Processor:bus clock ratios of N:1 and N:2
– 64-bit implementation of the PLB architecture
– 32-bit address
– 133MHz (1:1 ratio with PLB 128), maximum 1.1GB/s (no simultaneous read and write)
– 32-bit data path
– 32-bit address
– 66.66MHz
– 32-bit data path
– 10-bit address
Revision 1.29 – May 07, 2008
Data Sheet
11