FEATURES

• Single-Chip Microcontroller

• RISC MCU Central Processing Unit (RCPU)

— 32-Bit PowerPC Architecture

— Single-Issue Processor

— Integrated Floating-Point Unit

— Branch Prediction for Prefetch

— Branch Folding

— 32 x 32 Bits General-Purpose Register File

— 32 x 64 Bits Floating-Point Register File

— Precise Exception Model

— Internal Harvard Architecture: Load/Store Bus (L-Bus), Instruction Bus (I-Bus)

• System Interface Unit (SIU)

— Chip-Select Logic to Reduce or Eliminate External Decoding Logic

— Supports a Variety of Memory Types (SRAM, EEPROM)

— Supports 16- and 32-bit Devices

— System Protection Features Including Bus Monitor, Decrementer, and Periodic Interrupt

Timer

— On-Chip Phase-Locked Loop (PLL)

— Five Dual-Purpose I/O Ports, Two Dual-Purpose Output Ports

• Peripheral Control Unit (PCU)

— Software Watchdog

— Interrupt Controller to Manage External and Internal Interrupts to the CPU

— Dual-Purpose I/O Port

— L-bus IMB Interface (LIMB) Connecting L-Bus to Intermodule Bus 2 (IMB2)

• Development Support

— Internal Breakpoints

— External Watchpoints

— Internal Bus Visibility

— Program Flow Tracking

— Development Port

• 4-Kbyte On-Chip Instruction Cache (I-Cache)

• 4-Kbyte On-Chip Static RAM (SRAM)

• 3.3-V Supply Voltage

• Frequency: dc to 25 MHz (40 MHz in Future Versions)

• Power Consumption: 530 mW @ 25 MHz

• Interrupt Response Time: Less than 1 µs @ 25 MHz