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TABLE OF CONTENTS (Continued)
Title
Page
Number
4.5
Serial Communication Controllers (SCCs) .................................. 4-17
4.5.1
4.5.2
4.5.2.1
4.5.2.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.6.1
4.5.6.2
4.5.6.3
4.5.6.4
4.5.7
4.5.8
4.5.8.1
4.5.8.2
4.5.8.3
4.5.8.4
4.5.9
4.5.10
4.5.11
4.5.11.1
4.5.11.2
4.5.11.3
4.5.11.4
4.5.11.5
4.5.11.6
4.5.11.7
4.5.11.8
4.5.11.9
4.5.11.10
4.5.11.11
4.5.11.12
4.5.11.13
4.5.11.14
4.5.11.15
vi
SCC Features .................................................................... 4-19
SCC Configuration Register (SCON) .................................... 4-20
Asynchronous Baud Rate Generator Examples .............. 4-22
Synchronous Baud Rate Generator Examples ................ 4-22
SCC Mode Register (SCM) ................................................. 4-23
SCC Data Synchronization Register (DSR) ........................... 4-24
Buffer Descriptors Table .................................................... 4-25
SCC Parameter RAM Memory Map ..................................... 4-27
Data Buffer Function Code Register (TFCR, RFCR) .......... 4-27
Maximum Receive Buffer Length Register (MRBLR) ........ 4-28
Receiver Buffer Descriptor Number (RBD#) ................... 4-28
Transmit Buffer Descriptor Number (TBD#) ................... 4-28
SCC Initialization ............................................................... 4-28
Interrupt Mechanism ......................................................... 4-29
SCC Event Register (SCCE) .......................................... 4-29
SCC Mask Register (SCCM) .......................................... 4-29
SCC Status Register (SCCS) ......................................... 4-29
Bus Error on SDMA Access .......................................... 4-30
SCC Transparent Mode Support ......................................... 4-31
Power Saving with SCCs ................................................... 4-32
UART Controller ............................................................... 4-33
Normal Asynchronous Mode ....................................... 4-35
Asynchronous DDCMP Mode ....................................... 4-35
UART Memory Map .................................................... 4-35
UART Programming Model .......................................... 4-36
UART Command Set ................................................... 4-37
UART Address Recognition .......................................... 4-38
UART Control Character Recognition ............................ 4-39
Send Break ................................................................ 4-40
Send Preamble (IDLE) ................................................. 4-40
Wakeup Timer ............................................................ 4-41
UART Error-Handling Procedure ................................... 4-41
UART Mode Register ................................................... 4-43
UART Receive Buffer Descriptor (Rx BD) ....................... 4-45
UART Transmit Buffer Descriptor (Tx BD) ...................... 4-48
UART Event Register ................................................... 4-49
MC68302 USER'S MANUAL
MOTOROLA
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