10/31/95
SECTION 1: OVERVIEW
UM Rev 1
MOTOROLA
MC68341 USER'S MANUAL
iii
TABLE OF CONTENTS
Paragraph
Page
Number
Title
Number
Section 1
Device Overview
1.1
Features .............................................................................................. 1-2
Section 2
Signal Descriptions
2.1
Signal Index ........................................................................................ 2-3
2.2
Bus Signals ......................................................................................... 2-5
2.2.1
Address Bus .................................................................................... 2-6
2.2.1.1
Address Bus (A23–A0) ................................................................ 2-6
2.2.1.2
Address Bus (A31–A24) .............................................................. 2-6
2.2.2
Address Strobe (AS)........................................................................ 2-6
2.2.3
M68000 Address Strobe (68KAS) .................................................... 2-6
2.2.4
Data Bus (D15–D0) ......................................................................... 2-6
2.2.5
Data Strobe (DS) ............................................................................. 2-7
2.2.6
Upper And Lower Data Strobes (UDS , LDS) ................................... 2-7
2.2.7
Byte Write Enable (UWE , LWE) ....................................................... 2-7
2.2.8
Read/Write (R/W) ............................................................................ 2-7
2.2.9
Transfer Size (SIZ1, SIZ0)............................................................... 2-8
2.2.10
Function Codes (FC3–FC0)............................................................. 2-8
2.2.11
Chip Selects (CS7 –CS1 , CS0 /AVEC).............................................. 2-8
2.2.12
Interrupt Request Level (IRQ7 – IRQ1) ........................................... 2-9
2.3
Bus Control Signals............................................................................. 2-9
2.3.1
Data and Size Acknowledge (DSACK1 , DSACK0) .......................... 2-9
2.4
Bus Arbitration Signals ........................................................................ 2-9
2.4.1
Bus Request (BR) ............................................................................ 2-9
2.4.2
Bus Grant (BG ) ................................................................................ 2-10
2.4.3
Bus Grant Acknowledge (BGACK) .................................................. 2-10
2.4.4
Read-Modify-Write Cycle (RMC/RTCOUT) ..................................... 2-10
2.5
Exception Control Signals ................................................................... 2-10
2.5.1
Reset (RESET) ................................................................................ 2-10
2.5.2
Halt (HALT) ...................................................................................... 2-10
2.5.3
Bus Error (BERR ) ............................................................................ 2-10
2.6
Clock Signals ...................................................................................... 2-11
2.6.1
System Clock (CLKOUT)................................................................. 2-11
2.6.2
Crystal Oscillator (EXTAL, XTAL) .................................................... 2-11
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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