Motorola ColdFire MCF5281 User Manual page 16

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Number
22.5.6 QSPI Data Register (QDR)......................................................................... 22-14
22.5.7 Command RAM Registers (QCR0-QCR15).............................................. 22-15
22.5.8 Programming Example ............................................................................... 22-16
23.1 Overview........................................................................................................... 23-1
23.2 Serial Module Overview ................................................................................... 23-2
23.3 Register Descriptions ........................................................................................ 23-3
23.3.1 UART Mode Registers 1 (UMR1n).............................................................. 23-4
23.3.2 UART Mode Register 2 (UMR2n) ............................................................... 23-6
23.3.3 UART Status Registers (USRn) ................................................................... 23-7
23.3.4 UART Clock Select Registers (UCSRn) ...................................................... 23-8
23.3.5 UART Command Registers (UCRn) ............................................................ 23-9
23.3.6 UART Receive Buffers (URBn)................................................................. 23-11
23.3.7 UART Transmit Buffers (UTBn) ............................................................... 23-11
23.3.8 UART Input Port Change Registers (UIPCRn).......................................... 23-12
23.3.9 UART Auxiliary Control Register (UACRn)............................................. 23-13
23.3.10 UART Interrupt Status/Mask Registers (UISRn/UIMRn).......................... 23-13
23.3.11 UART Baud Rate Generator Registers (UBG1n/UBG2n) ......................... 23-14
23.3.12 UART Input Port Register (UIPn) .............................................................. 23-15
23.3.13 UART Output Port Command Registers (UOP1n/UOP0n) ....................... 23-15
23.4 UART Module Signal Definitions .................................................................. 23-17
23.5 Operation ........................................................................................................ 23-18
23.5.1 Transmitter/Receiver Clock Source............................................................ 23-18
23.5.2 Transmitter and Receiver Operating Modes............................................... 23-20
23.5.3 Looping Modes ........................................................................................... 23-25
23.5.4 Multidrop Mode.......................................................................................... 23-26
23.5.5 Bus Operation ............................................................................................. 23-28
23.5.6 Programming .............................................................................................. 23-28
24.1 Overview........................................................................................................... 24-1
24.2 Interface Features.............................................................................................. 24-1
2
24.3 I C System Configuration................................................................................. 24-3
2
24.4 I C Protocol ...................................................................................................... 24-3
24.4.1 Arbitration Procedure ................................................................................... 24-4
24.4.2 Clock Synchronization.................................................................................. 24-5
24.4.3 Handshaking ................................................................................................. 24-5
xvi
CONTENTS
Title
Chapter 23
UART Modules
Chapter 24
2
I C Interface
MCF5282 User's Manual
Page
Number
MOTOROLA