Table of Contents
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11/2/95
TABLE OF CONTENTS (Continued)
Paragraph
Number
7.4.1.2
Interrupt Level Register (ILR).................................................................. 7-21
7.4.1.3
Interrupt Vector Register (IVR)................................................................ 7-21
7.4.1.4
Mode Register 1 (MR1)............................................................................ 7-22
7.4.1.5
Status Register (SR)................................................................................. 7-24
7.4.1.6
Clock-Select Register (CSR).................................................................. 7-26
7.4.1.7
Command Register (CR) ......................................................................... 7-27
7.4.1.8
Receiver Buffer (RB)................................................................................. 7-30
7.4.1.9
Transmitter Buffer (TB)............................................................................. 7-30
7.4.1.10
Input Port Change Register (IPCR)........................................................ 7-31
7.4.1.11
Auxiliary Control Register (ACR)............................................................ 7-32
7.4.1.12
Interrupt Status Register (ISR)................................................................ 7-32
7.4.1.13
Interrupt Enable Register (IER)............................................................... 7-34
7.4.1.14
Input Port (IP)............................................................................................. 7-35
7.4.1.15
Output Port Control Register (OPCR).................................................... 7-35
7.4.1.16
Output Port Data Register (OP) .............................................................. 7-37
7.4.1.17
Mode Register 2 (MR2)............................................................................ 7-37
7.4.2
Programming................................................................................................. 7-40
7.4.2.1
Serial Module Initialization ..................................................................... 7-40
7.4.2.2
I/O Driver Example.................................................................................... 7-40
7.4.2.3
Interrupt Handling..................................................................................... 7-40
7.5
Serial Module Initialization Sequence ......................................................... 7-46
7.5.1
Serial Module Configuration ...................................................................... 7-46
7.5.2
Serial Module Example Configuration Code .......................................... 7-47
8.1
Module Overview.............................................................................................. 8-1
8.1.1
Timer and Counter Functions..................................................................... 8-2
8.1.1.1
Prescaler and Counter............................................................................. 8-2
8.1.1.2
Timeout Detection..................................................................................... 8-2
8.1.1.3
Comparator................................................................................................ 8-2
8.1.1.4
Clock Selection Logic.............................................................................. 8-3
8.1.2
Internal Control Logic................................................................................... 8-3
8.1.3
Interrupt Control Logic ................................................................................. 8-4
8.2
Timer Modules Signal Definitions ................................................................. 8-4
8.2.1
Timer Input (TIN1, TIN2) .............................................................................. 8-5
Timer Gate ( TGATE1 , TGATE2 )................................................................ 8-6
8.2.2
8.2.3
Timer Output (TOUT1, TOUT2)................................................................... 8-6
8.3
Operating Modes .............................................................................................. 8-6
8.3.1
Input Capture/Output Compare.................................................................. 8-6
8.3.2
Square-Wave Generator............................................................................. 8-8
xiv
Freescale Semiconductor, Inc.
SECTION 1: OVERVIEW
Title
Section 8
Timer Modules
MC68340 USER'S MANUAL
For More Information On This Product,
Go to: www.freescale.com
UM Rev.1.0
P a g e
Number
MOTOROLA
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