9-8
DSP56309UM/D MOTOROLA
Triple Timer Module
Triple Timer Module Programming Model
If the prescaler source clock is external, the prescaler counter is incremented by signal
transitions on the TIO signal. The external clock is internally synchronized to the internal
clock. The external clock frequency must be lower than the DSP56309 internal operating
frequency divided by 4 (CLK/4).
The PS[1:0] bits are cleared by a hardware RESET signal or a software RESET instruction.
Note:
To insure proper operation, change the PS[1:0] bits only when the prescaler
counter is disabled. Disable the prescaler counter by clearing the TE bit in the
TCSR of each of three timers.
9.3.2.3
TPLR Reserved Bit 23
This reserved bit is read as 0 and should be written with 0 for future compatibility.
9.3.3
Timer Prescaler Count Register (TPCR)
The TPCR is a 24-bit, read-only register that reflects the current value in the prescaler
counter. The register bits are shown in
Table 9-1
Prescaler Source Selection
PS1
PS0
Prescaler Clock Source
0
0
Internal CLK/2
0
1
TIO0
1
0
TIO1
1
1
TIO2
23
22
21
20
19
18
17
16
15
14
13
12
PC20
PC19
PC18
PC17
PC16
PC15
PC14
PC13
PC12
11
10
9
8
7
6
5
4
3
2
1
0
PC11
PC10
PC9
PC8
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
Ñ reserved, read as 0, should be written with 0 for future compatibility
Figure 9-5
Timer Prescaler Count Register (TPCR)
Содержание DSP56309
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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 ...
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