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Data
Sheet
Overview
The PowerPC 403GCX 32-bit RISC embedded
controller offers high performance and functional
integration with low power consumption. The
403GCX RISC CPU executes at sustained
speeds approaching one cycle per instruction.
On-chip caches and integrated DRAM and
SRAM control functions reduce chip count and
design complexity in systems, while improving
system throughput.
External I/O devices or SRAM/DRAM memory
banks can be directly attached to the 403GCX
bus interface unit (BIU). Interfaces for up to eight
memory banks and I/O devices, including a max-
imum of four DRAM banks, can be configured
individually, allowing the BIU to manage devices
or memory banks with differing control, timing, or
bus width requirements.
Interrupt
Controller
JTAG
Port
Serial
Port
4-Channel
DMA
Controller
(Address
and
Control)
Timers
RISC Execution Unit
Memory Management Unit
Instruction
Cache Unit
Data
Cache Unit
On-chip
Peripheral
Bus
Bus Interface Unit
DRAM Controller
I/O Controller
Data Address
Bus Bus
DRAM
Controls
SRAM, ROM, I/O
Controls