MC68331
USER’S MANUAL
MOTOROLA
vii
TABLE OF CONTENTS
(Continued)
Title
Paragraph
Page
6.2.1.2
6.2.1.3
6.2.2
6.3
6.3.1
6.3.1.1
6.3.1.2
6.3.2
6.3.2.1
6.3.2.2
6.3.2.3
6.3.3
6.3.4
6.3.5
6.3.5.1
6.3.5.2
6.3.5.3
6.3.5.4
6.3.6
6.4
6.4.1
6.4.1.1
6.4.1.2
6.4.1.3
6.4.2
6.4.3
6.4.3.1
6.4.3.2
6.4.3.3
6.4.3.4
6.4.3.5
6.4.3.6
6.4.3.7
6.4.3.8
6.4.3.9
6.5
Freeze Operation ........................................................................... 6-3
QSM Interrupts ............................................................................... 6-3
QSM Pin Control Registers ....................................................................6-4
Queued Serial Peripheral Interface ................................................................6-5
QSPI Registers .......................................................................................6-6
Control Registers ........................................................................... 6-7
Status Register ............................................................................... 6-7
QSPI RAM ..............................................................................................6-7
Receive RAM ................................................................................. 6-8
Transmit RAM ................................................................................ 6-8
Command RAM .............................................................................. 6-8
QSPI Pins ...............................................................................................6-8
QSPI Operation ......................................................................................6-9
QSPI Operating Modes ........................................................................6-10
Master Mode ................................................................................ 6-17
Master Wraparound Mode ........................................................... 6-19
Slave Mode .................................................................................. 6-20
Slave Wraparound Mode ............................................................. 6-21
Peripheral Chip Selects ........................................................................6-21
Serial Communication Interface ...................................................................6-22
SCI Registers .......................................................................................6-22
Control Registers ......................................................................... 6-22
Status Register ............................................................................. 6-25
Data Register ............................................................................... 6-25
SCI Pins ...............................................................................................6-25
SCI Operation .......................................................................................6-25
Definition of Terms ....................................................................... 6-26
Serial Formats .............................................................................. 6-26
Baud Clock ................................................................................... 6-26
Parity Checking ............................................................................ 6-27
Transmitter Operation .................................................................. 6-27
Receiver Operation ...................................................................... 6-29
Idle-Line Detection ....................................................................... 6-29
Receiver Wakeup ......................................................................... 6-30
Internal Loop ................................................................................ 6-31
QSM Initialization .........................................................................................6-31
SECTION 7GENERAL-PURPOSE TIMER
7.1
7.2
7.3
General ...........................................................................................................7-1
GPT Registers and Address Map ...................................................................7-2
Special Modes of Operation ...........................................................................7-3