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SECTION 1: OVERVIEW
UM Rev 1
MOTOROLA
MC68340 USER'S MANUAL
xv
TABLE OF CONTENTS (Continued)
Paragraph
Page
Number
Title
Number
8.3.3
Variable Duty-Cycle Square-Wave Generator........................................8-9
8.3.4
Variable-Width Single-Shot Pulse Generator.........................................8-10
8.3.5
Pulse-Width Measurement..........................................................................8-12
8.3.6
Period Measurement....................................................................................8-13
8.3.7
Event Count ...................................................................................................8-14
8.3.8
Timer Bypass.................................................................................................8-16
8.3.9
Bus Operation................................................................................................8-17
8.3.9.1
Read Cycles...............................................................................................8-17
8.3.9.2
Write Cycles...............................................................................................8-17
8.3.9.3
Interrupt Acknowledge Cycles................................................................8-17
8.4
Register Description.........................................................................................8-17
8.4.1
Module Configuration Register (MCR)......................................................8-18
8.4.2
Interrupt Register (IR) ...................................................................................8-20
8.4.3
Control Register (CR)...................................................................................8-20
8.4.4
Status Register (SR).....................................................................................8-23
8.4.5
Counter Register (CNTR) ............................................................................8-25
8.4.6
Preload 1 Register (PREL1)........................................................................8-25
8.4.7
Preload 2 Register (PREL2)........................................................................8-26
8.4.8
Compare Register (COM)............................................................................8-26
8.5
Timer Module Initialization Sequence..........................................................8-27
8.5.1
Timer Module Configuration.......................................................................8-27
8.5.2
Timer Module Example Configuration Code ...........................................8-28
Section 9
IEEE 1149.1 Test Access Port
9.1
Overview.............................................................................................................9-1
9.2
TAP Controller...................................................................................................9-2
9.3
Boundary Scan Register .................................................................................9-3
9.4
Instruction Register...........................................................................................9-9
9.4.1
EXTEST (000) ...............................................................................................9-10
9.4.2
SAMPLE/PRELOAD (001) ..........................................................................9-10
9.4.3
BYPASS (X1X, 101).....................................................................................9-11
9.4.4
HI-Z (100) .......................................................................................................9-11
9.5
MC68340 Restrictions......................................................................................9-11
9.6
Non-IEEE 1149.1 Operation...........................................................................9-12
Section 10
Applications
10.1
Minimum System Configuration...................................................................10-1
10.1.1
Processor Clock Circuitry ..........................................................................10-1
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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