11/2/95
SECTION 1: OVERVIEW
UM Rev.1.0
xiv
MC68340 USER'S MANUAL
MOTOROLA
TABLE OF CONTENTS (Continued)
Paragraph
Page
Number
Title
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
Section 8
Timer Modules
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
8.2.2
Timer Gate (TGATE1, TGATE2)................................................................8-6
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
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Freescale Semiconductor, Inc.
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