Triple Timer Module
Timer Operational Modes
MOTOROLA
DSP56309UM/D 9-23
9.4.2.4
Measurement Capture (Mode 6)
In this mode, the timer counts the number of clocks that elapse between starting the
timer and receiving an external signal.
Set the TE bit to clear the counter and enable the timer. The value to which the timer is to
count is loaded into the TLR. When the first timer clock signal is received, the counter is
loaded with the TLR value. The timer clock signal can be taken from either the DSP56309
clock divided by two (CLK/2) or from the prescaler clock output. Each subsequent clock
signal increments the counter.
At the first appropriate transition of the external clock detected on the TIO signal, the
TCF bit in the TCSR is set and, if the TCIE bit is set, a compare interrupt is generated, the
counter halts, and the contents of the counter are loaded into the TCR. The value of the
TCR represents the delay between the setting of the TE bit and the detection of the first
clock edge signal on the TIO signal.
The value of the INV bit determines whether a high-to-low (1 to 0) or low-to-high (0 to 1)
transition of the external clock signals the end of the timing period. If the INV bit is set, a
high-to-low transition signals the end of the timing period. If INV is cleared, a
low-to-high transition signals the end of the timing period.
If the counter overflows, the TOF bit is set, and if TOIE is set, an overflow interrupt is
generated. The counter contents can be read at any time by reading the TCR.
Bit Settings
Mode Characteristics
TC3
TC2
TC1
TC0
Mode
Name
Function
TIO
Clock
0
1
1
0
6
Capture
Measurement
Input
Internal
Содержание DSP56309
Страница 25: ...xxii DSP56309UM D MOTOROLA Figure D 25 Port E Registers PCRE PRRE PDRE D 39 ...
Страница 30: ...MOTOROLA DSP56309UM D 1 1 SECTION 1 DSP56309 OVERVIEW ...
Страница 47: ...1 18 DSP56309UM D MOTOROLA DSP56309 Overview DSP56309 Architecture Overview ...
Страница 48: ...MOTOROLA DSP56309UM D 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Страница 85: ...2 38 DSP56309UM D MOTOROLA Signal Connection Descriptions OnCE JTAG Interface ...
Страница 86: ...MOTOROLA DSP56309UM D 3 1 SECTION 3 MEMORY CONFIGURATION ...
Страница 104: ...MOTOROLA DSP56309UM D 4 1 SECTION 4 CORE CONFIGURATION ...
Страница 124: ...MOTOROLA DSP56309UM D 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 125: ...5 2 DSP56309UM D MOTOROLA General Purpose I O 5 1 INTRODUCTION 5 3 5 2 PROGRAMMING MODEL 5 3 ...
Страница 128: ...MOTOROLA DSP56309UM D 6 1 SECTION 6 HOST INTERFACE HI08 ...
Страница 166: ...MOTOROLA DSP56309UM D 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Страница 212: ...MOTOROLA DSP56309UM D 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Страница 241: ...8 30 DSP56309UM D MOTOROLA Serial Communication Interface SCI GPIO Signals and Registers ...
Страница 242: ...MOTOROLA DSP56309UM D 9 1 SECTION 9 TRIPLE TIMER MODULE ...
Страница 269: ...9 28 DSP56309UM D MOTOROLA Triple Timer Module Timer Operational Modes ...
Страница 270: ...MOTOROLA DSP56309UM D 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Страница 302: ...MOTOROLA DSP56309UM D 11 1 SECTION 11 JTAG PORT ...
Страница 369: ...C 22 DSP56309UM D MOTOROLA DSP56309 BSDL Listing ...
Страница 370: ...MOTOROLA DSP56309UM D D 1 APPENDIX D PROGRAMMING REFERENCE ...
Страница 405: ......
Страница 409: ......