鈥?/div>
Flexible interface to external bus masters
Data
Sheet
Overview
The PowerPC 403GB 32-bit RISC embedded
controller offers high performance and functional
integration with low power consumption. The
403GB 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 complex-
ity in systems, while improving system through-
put.
External I/O devices or SRAM/DRAM memory
banks can be directly attached to the 403GB bus
interface unit (BIU). Interfaces for up to six mem-
ory banks and I/O devices, including a maximum
of two DRAM banks, can be configured individu-
ally, allowing the BIU to manage devices or
memory banks with differing control, timing, or
bus width requirements.
鈥?/div>
Hardware multiplier and divider for faster
integer arithmetic
鈥?/div>
Thirty-two 32-bit general purpose registers
Applications
鈥?/div>
Set-top boxes
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Consumer electronics and video games
鈥?/div>
Telecommunications and networking
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Office automation (printers, copiers, fax
machines)
Specifications
鈥?/div>
28MHz operation
鈥?/div>
Interfaces to both 3V and 5V technologies
鈥?/div>
Low-power 3.3V operation with built-in
power management and stand-by mode
鈥?/div>
Low-cost 128 lead TQFP package
鈥?/div>
0.5
碌
m triple-level-metal CMOS
Interrupt
Controller
JTAG
Port
2-Channel
DMA
Controller
(Address
and
Control)
Timers
RISC Execution Unit
Instruction
Data
Cache Unit Cache Unit
Bus Interface Unit
DRAM Controller
I/O Controller
Data Address
Bus Bus
DRAM
Controls
SRAM, ROM, I/O
Controls
next
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