Datasheet

MPC7447A RISC Microprocessor Hardware Specifications, Rev. 5
Freescale Semiconductor 7
Comparison with the MPC7447, MPC7445, and MPC7441
— IEEE 1149.1 JTAG interface
— Array built-in self test (ABIST)—factory test only
• Reliability and serviceability
— Parity checking on system bus
— Parity checking on the L1 and L2 caches
3 Comparison with the MPC7447, MPC7445, and
MPC7441
Table 1 compares the key features of the MPC7447A with the key features of the earlier MPC7447,
MPC7445, and MPC7441. All are based on the MPC7450 RISC microprocessor and are very similar
architecturally. The MPC7447A is identical to the MPC7447 but includes the DFS and temperature diode
features.
Table 1. Microarchitecture Comparison
Microarchitectural Specs MPC7447A MPC7447 MPC7445 MPC7441
Basic Pipeline Functions
Logic inversions per cycle 18
Pipeline stages up to execute 5
Total pipeline stages (minimum) 7
Pipeline maximum instruction throughput 3 + branch
Pipeline Resources
Instruction buffer size 12
Completion buffer size 16
Renames (integer, float, vector) 16, 16, 16
Maximum Execution Throughput
SFX 3
Vector 2 (any 2 of 4 units)
Scalar floating-point 1
Out-of-Order Window Size in Execution Queues
SFX integer units 1 entry × 3 queues
Vector units In order, 4 queues
Scalar floating-point unit In order
Branch Processing Resources
Prediction structures BTIC, BHT, link stack
BTIC size, associativity 128-entry, 4-way