PowerPC 403GA
32-Bit RISC
Data
Sheet
Embedded Controller
Overview
Features
The PowerPC 403GA 32-bit RISC embedded
controller offers high performance and functional
integration with low power consumption. The
403GA 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.
• PowerPC RISC CPU and instruction set
architecture
• Glueless interfaces to DRAM, SRAM,
ROM, and peripherals, including byte and
half-word devices
• Separate instruction cache and write-back
data cache, both two-way set-associative
• Minimized interrupt latency
• Individually programmable on-chip
controllers for:
External I/O devices or SRAM/DRAM memory
banks can be directly attached to the 403GA bus
interface unit (BIU). Interfaces for up to eight
memory banks and I/O devices, including a
maximum 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.
–Four DMA channels
–DRAM, SRAM, and ROM banks
–Peripherals
–Serial port
–External interrupts
• Flexible interface to external bus masters
• Hardware multiplier and divider for faster
Interrupt
Controller
integer arithmetic
Timers
• Thirty-two 32-bit general purpose registers
RISC Execution Unit
JTAG
Port
Applications
• Set-top boxes
• Consumer electronics and video games
• Telecommunications and networking
Instruction
Cache Unit
Data
Cache Unit
Serial
Port
4-Channel
DMA
• Office automation (printers, copiers, fax
On-chip
Peripheral
Bus
machines)
Controller
• Personal digital assistants (PDA)
(Address
and
Control)
Specifications
• 25MHz, and 33MHz, and 40MHz versions
• Interfaces to both 3V and 5V technologies
Bus Interface Unit
DRAM Controller
I/O Controller
• Low-power 3.3V operation with built-in
power management and stand-by mode
• Low-cost 160 lead PQFP package
• 0.5 µm triple-level-metal CMOS
SRAM, ROM, I/O
Controls
DRAM
Controls
Data Address
Bus
Bus