This document contains information on a new product under development by Motorola. The product is MPC7400 RISC microprocessor, which is an implementation of the PowerPC family. The document describes the electrical and physical characteristics of the MPC7400.
This document provides hardware specifications for the Motorola MPC7400 RISC microprocessor, the first implementation of the fourth generation (G4) of PowerPC microprocessors. It details the processor's electrical and physical characteristics, including its implementation of the PowerPC 32-bit architecture and the new AltiVec technology instruction set.
The datasheet covers major features such as the branch processing unit, dispatch unit, fixed-point and floating-point units, and the AltiVec unit. It also describes the Level 1 and Level 2 cache structures, memory management unit, bus interface, power management capabilities, and testability features.
| Architecture | PowerPC 32-bit |
|---|---|
| Instruction Set | RISC with AltiVec |
| Instruction Fetch | Four instructions per clock |
| Branch Processing | One branch per cycle |
| Branch History Table | 312-entry |
| Instruction Cache | 64-entry, 4-way set associative |
| Completion Buffer | 8-entry |
| Fixed-Point Unit 1 | multiply, divide, shift, rotate, arithmetic, logical |
| Floating-Point Latency | 3 cycle |
| L1 Instruction Cache | 32K, 32-byte line, 8-way set associative |
| L1 Data Cache | 32K, 32-byte line, 8-way set associative |
| L2 Cache Support | 512K, 1M, and 2Mbyte |
| Data Bus Width | 64 bit |
| Instruction TLB | 128 entry, 2-way set associative |
| Physical Memory Support | 4 gigabytes |
| Core Voltage | 1.8 volt |
| Static Power Saving Modes | doze, nap, and sleep |
The MPC7400 is the first implementation of the fourth generation (G4) of PowerPC microprocessors from Motorola.
Yes, the MPC7400 adds an implementation of the new AltiVec technology instruction set.
The floating-point unit has a 3-cycle latency and 1-cycle throughput for single or double precision.
The processor supports three static power saving modes: doze, nap, and sleep.