MPC8280 datasheet(100/1386 Pages) FREESCALE

100 / 1386 page

Overview

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

1-6

Freescale Semiconductor

Figure 1-1. MPC8280 Block Diagram

Both the system core and the CPM have an internal PLL, which allows independent optimization of the

frequencies at which they run. The system core and CPM are both connected to the 60x bus.

1.2.1

G2_LE Core

The G2_LE core is derived from the MPC603e microprocessor with power management modifications.

The core is a high-performance low-power implementation of the family of reduced instruction set

computer (RISC) microprocessors. The G2_LE 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 G2_LE

cache provides snooping to ensure data coherency 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 MPC8280 pins.

16 Kbytes

G2_LE Core

I-Cache

I-MMU

16 Kbytes

D-Cache

D-MMU

Communication Processor Module (CPM)

Timers

Parallel I/O

Baud Rate

Generators

32 KB

32-bit RISC Microcontroller

and Program ROM

Serial

DMAs

4 Virtual

IDMAs

60x-to-PCI

Bridge

Memory Controller

Clock Counter

System Functions

System Interface Unit

(SIU)

Local Bus

32 bits, up to 100 MHz

PCI Bus

32 bits, up to 66 MHz

MCC11

MCC2

FCC1

FCC2

FCC3

SCC1

SCC2

SCC3

SCC4/

SMC1

SMC2

SPI

I2C

Serial Interface2

3 MII or RMII

2 UTOPIA

Ports3

Ports

60x Bus

Microcode

IMA1

Data

Interrupt

Controller

Time Slot Assigner

TC Layer Hardware1

8 TDM Ports2

Non-Multiplexed

I/O

60x-to-Local

Bus Interface Unit

32 KB

Instruction

Notes:

1 MPC8280 only (not on MPC8270, the VR package, nor the ZQ package)

2 MPC8280 has 2 serial interface (SI) blocks and 8 TDM ports. MPC8270 and the VR and ZQ packages have

only 1 SI block and 4 TDM ports (TDM2[A–D]).

3 MPC8280, MPC8275VR, MPC8275ZQ only (not on MPC8270, MPC8270VR, nor MPC8270ZQ)

RAM

USB

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