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DSP56303 DSP56301 User’s Manual
Chapter
9
Triple Timer Module
9.1
Overview................................................................................................................................ 9-1
9.1.1
Triple Timer Module Block Diagram .................................................................................... 9-2
9.1.2
Individual Timer Block Diagram........................................................................................... 9-2
9.2
Operation ............................................................................................................................... 9-3
9.2.1
Timer After Reset .................................................................................................................. 9-3
9.2.2
Timer Initialization ................................................................................................................ 9-4
9.2.3
Timer Exceptions ................................................................................................................... 9-4
9.3
Operating Modes.................................................................................................................... 9-5
9.3.1
Triple Timer Modes ............................................................................................................... 9-6
9.3.1.1
Timer GPIO (Mode 0) ..................................................................................................... 9-6
9.3.1.2
Timer Pulse (Mode 1) ...................................................................................................... 9-8
9.3.1.3
Timer Toggle (Mode 2) ................................................................................................. 9-10
9.3.1.4
Timer Event Counter (Mode 3) ..................................................................................... 9-12
9.3.2
Signal Measurement Modes................................................................................................. 9-14
9.3.2.1
Measurement Input Width (Mode 4) ............................................................................. 9-14
9.3.2.2
Measurement Input Period (Mode 5)............................................................................. 9-16
9.3.2.3
Measurement Capture (Mode 6) .................................................................................... 9-18
9.3.3
Pulse Width Modulation (PWM, Mode 7)........................................................................... 9-19
9.3.4
Watchdog Modes ................................................................................................................. 9-22
9.3.4.1
Watchdog Pulse (Mode 9) ............................................................................................. 9-22
9.3.4.2
Watchdog Toggle (Mode 10)......................................................................................... 9-24
9.3.4.3
Reserved Modes............................................................................................................. 9-25
9.3.5
Special Cases ....................................................................................................................... 9-25
9.3.6
DMA Trigger ....................................................................................................................... 9-25
9.4
Triple Timer Module Programming Model ......................................................................... 9-25
9.4.1
Prescaler Counter ................................................................................................................. 9-25
9.4.2
Timer Prescaler Load Register (TPLR) ............................................................................... 9-27
9.4.3
Timer Prescaler Count Register (TPCR) ............................................................................. 9-28
9.4.4
Timer Control/Status Register (TCSR)................................................................................ 9-28
9.4.5
Timer Load Register (TLR) ................................................................................................. 9-33
9.4.6
Timer Compare Register (TCPR) ........................................................................................ 9-34
9.4.7
Timer Count Register (TCR) ............................................................................................... 9-34
A
Bootstrap Program
B
Programming Reference
B.1
Internal I/O Memory Map......................................................................................................B-3
B.2
Interrupt Sources and Priorities .............................................................................................B-9
B.3
Programming Sheets ............................................................................................................B-13
Index
