Motorola MC68340 manual M68300 Family

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

The primary features of the MC68340, illustrated in Figure 1-1, are as follows:

•High Functional Integration on a Single Piece of Silicon

•CPU32—MC68020-Derived 32-Bit Central Processor Unit

—Upward Object-Code Compatible with MC68000 and MC68010

—Additional MC68020 Instructions and Addressing Modes

—Unique Embedded Control Instructions

—Fast Two-Clock Register Instructions—10,045 Dhrystones

•Two-Channel Low-Latency DMA Controller for High-Speed Memory Transfers

—Single- or Dual-Address Transfers

—32-Bit Addresses and Counters

—8-, 16-, and 32-Bit Data Transfers

—50 Mbyte/Sec Sustained Transfers (12.5 Mbyte/Sec Memory-to-Memory)

•Two-Channel Universal Synchronous/Asynchronous Receiver/Transmitter (USART)

—Baud Rate Generators

—Modem Control

—MC68681/MC2681 Compatible

—9.8 Mbits/Sec Maximum Transfer Rate

•Two Independent Counter/Timers

—16-Bit Counter

—Up to 8-Bit Prescaler

—Multimode Operation

—80-ns Resolution

•System Integration Module Incorporates Many Functions Typically Relegated to External PALs, TTL, and ASIC, such as:

— System Configuration	— External Bus Interface
— System Protection	— Periodic Interrupt Timer
— Chip Select and Wait State Generation — Interrupt Response
— Clock Generation	— Bus Arbitration
— Dynamic Bus Sizing	— IEEE 1149.1 Boundary Scan (JTAG)
— Up to 16 Discrete I/O Lines	— Power-On Reset

•32 Address Lines, 16 Data Lines

•Power Consumption Control

—Static HCMOS Technology Reduces Power in Normal Operation

—Low Voltage Operation at 3.3 V ±0.3 V (MC68340V only)

—Programmable Clock Generator Throttles Frequency

—Unused Peripherals Can Be Turned Off

—LPSTOP Provides an Idle State for Lowest Standby Current

•0–16.78 MHz or 0–25.16 MHz Operation

•144-Pin Ceramic Quad Flat Pack (CQFP) or 145-Pin Plastic Pin Grid Array (PGA)

As a low voltage part, the MC68340V can operate with a 3.3-V power supply. MC68340 is used throughout this manual to refer to both the low voltage and standard 5-V parts since both are functionally equivalent.

1.1 M68300 FAMILY

The MC68340 is one of a series of components in the M68300 family. Other members of the family include the MC68302, MC68330, MC68331, MC68332, and MC68333.

1- 2MC68340 USER’S MANUALMOTOROLA

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