PC8260MTPU150 データシートの表示（PDF） - Atmel Corporation

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PC8260MTPU150

PowerPC-based Communications Processors

Atmel Corporation 

EC603e Core

The EC603e core is derived from the PowerPC603e microprocessor without the float-

ing-point unit and with power management modifications.The core is a high-

performance low-power implementation of the PowerPC family of reduced instruction

set computer (RISC) microprocessors. The EC603e core implements the 32-bit portion

of the PowerPC architecture, which provides 32-bit effective addresses, integer data

types of 8, 16 and 32 bits. The EC603e cache provides snooping to ensure data coher-

ency with other masters. This helps ensure coherency between the CPM and system

core.

The core includes 16 Kbytes of instruction cache and 16 Kbytes of data cache. It has a

64-bit split-transaction external data bus which is connected directly to the external

PC8260 pins.

The EC603e core has an internal common on-chip (COP) debug processor. This pro-

cessor allows access to internal scan chains for debugging purposes. It is also used as

a serial connection to the core for emulator support.

The EC603e core performance for the SPEC 95 benchmark for integer operations

ranges between 4.4 and 5.1 at 200 MHz. In Dhrystone 2.1 MIPS, the EC603e is 280

MIPS at 200 MHz (compared to 86 MIPS of the PC860 at 66 MHz).

The EC603e core can be disabled. In this mode, the PC8260 functions as a slave

peripheral to an external core or to another PC8260 device with its core enabled.

4 PC8260 PowerQUICC II

2131B–HIREL–02/03

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