11/2/95
SECTION 1: OVERVIEW
UM Rev.1.0
Freescale Semiconductor, Inc.
TABLE OF CONTENTS (Continued)
Paragraph
Number
Page
Number
Title
2.7
Bus Control Signals .........................................................................................2-6
Data and Size Acknowledge (DSACK1, DSACK0)................................2-6
Address Strobe (AS)....................................................................................2-6
Data Strobe (DS)...........................................................................................2-7
Transfer Size (SIZ1, SIZ0)..........................................................................2-7
Read/Write (R/W)...........................................................................................2-7
Bus Arbitration Signals....................................................................................2-7
Bus Request (BR)..........................................................................................2-7
Bus Grant (BG)...............................................................................................2-7
Bus Grant Acknowledge (BGACK).............................................................2-7
Read-Modify-Write Cycle (RMC).................................................................2-8
Exception Control Signals..............................................................................2-8
Reset (RESET)...............................................................................................2-8
Halt (HALT)....................................................................................................2-8
Bus Error (BERR)...........................................................................................2-8
Clock Signals....................................................................................................2-8
System Clock (CLKOUT)............................................................................2-8
Crystal Oscillator (EXTAL, XTAL)...............................................................2-9
External Filter Capacitor (XFC)..................................................................2-9
Clock Mode Select (MODCK).....................................................................2-9
Instrumentation and Emulation Signals.......................................................2-9
Instruction Fetch (IFETCH)..........................................................................2-9
Instruction Pipe (IPIPE)...............................................................................2-9
Breakpoint (BKPT)........................................................................................2-10
Freeze (FREEZE)..........................................................................................2-10
DMA Module Signals.......................................................................................2-10
DMA Request (DREQ2, DREQ1).................................................................2-10
DMA Acknowledge (DACK2, DACK1)......................................................2-10
DMA Done (DONE2, DONE1)......................................................................2-10
Serial Module Signals.....................................................................................2-11
Serial Crystal Oscillator (X2, X1) ...............................................................2-11
Serial External Clock Input (SCLK)...........................................................2-11
Receive Data (RxDA, RxDB).......................................................................2-11
Transmit Data (TxDA, TxDB).......................................................................2-11
Clear to Send (CTSA, CTSB).....................................................................2-11
Request to Send (RTSA, RTSB)................................................................2-11
Transmitter Ready (T≈RDYA).....................................................................2-11
Receiver Ready (R≈RDYA) .........................................................................2-12
Timer Signals....................................................................................................2-12
Timer Gate (TGATE2, TGATE1)................................................................2-12
Timer Input (TIN2, TIN1)..............................................................................2-12
Timer Output (TOUT2, TOUT1)...................................................................2-12
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.8
2.8.1
2.8.2
2.8.3
2.8.4
2.9
2.9.1
2.9.2
2.9.3
2.10
2.10.1
2.10.2
2.10.3
2.10.4
2.11
2.11.1
2.11.2
2.11.3
2.11.4
2.12
2.12.1
2.12.2
2.12.3
2.13
2.13.1
2.13.2
2.13.3
2.13.4
2.13.5
2.13.6
2.13.7
2.13.8
2.14
2.14.1
2.14.2
2.14.3
iv
MC68340 USER'S MANUAL
MOTOROLA
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