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192 Timer/Counter Periods and Resolution
Series 5000 Square Wave Output
For pulsewidth short output and pulsecount output, Table 69 lists the possible
choices for pulsetrain repetition frequencies for a Series 5000 device.
The resolution and range values in Table 69 apply to all system clock settings,
that is, they do not scale with changes to the system clock.
If you specify an alternate clock value (using the io_set_clock() function with a
TCCLK_* macro value) that is lower than your device’s system clock setting, the
resolution and range values reflect the expected values specified in
Table 69.
However, you cannot specify a value that defines a clock rate that is higher than
one-half of the device’s system clock. For example, if your system clock rate is 20
MHz, you can specify any TCCLK_* macro that defines a 10 MHz or lower clock
rate (that is, you cannot specify TCCLK_40MHz or TCCLK_20MHz – no error is
issued, but the effective value used in this case is TCCLK_10MHz).
Table 69. Series 5000 Timer/Counter Square Wave Output
TCCLK Macro Repetition Rate
Repetition Period
or Pulse Period
Resolution of
Pulse
TCCLK_40MHz 156.2 kHz 6.4 μs 25 ns
TCCLK_20MHz 78.1 kHz 12.8 μs 50 ns
TCCLK_10MHz 39.1 kHz 25.6 μs 0.1 μs
TCCLK_5MHz 19531 Hz 51.2 μs 0.2 μs
TCCLK_2500kHz 9766 Hz 102.4 μs 0.4 μs
TCCLK_1250kHz 4883 Hz 204.8 μs 0.8 μs
TCCLK_625kHz 2441 Hz 409.6 μs 1.6 μs
TCCLK_312k5Hz 1221 Hz 819.2 μs 3.2 μs
TCCLK_156k2Hz 610 Hz 1638.4 μs 6.4 μs
TCCLK_78k12Hz 305 Hz 3276.8 μs 12.8 μs
TCCLK_39k06Hz 153 Hz 6553.6 μs 25.6 μs
TCCLK_19k53Hz 76.3 Hz 13.11 ms 51.2 μs
TCCLK_9k77Hz 38.1 Hz 26.21 ms 102.4 μs
TCCLK_4k88Hz 19.1 Hz 52.43 ms 204.8 μs
TCCLK_2k44Hz 9.5 Hz 104.86 ms 409.6 μs
TCCLK_1k22Hz 4.77 Hz 209.72 ms 819.2 μs
- I/O Model Reference for Smart 1
- Transceivers and Neuron Chips 1
- Welcome 3
- Audience 3
- Related Documentation 3
- Mini FX User’s Guide 4
- Series 5000 Chip Data Book 4
- Table of Contents 5
- Introduction 11
- Overview 12
- Direct I/O Models 14
- Parallel I/O Models 14
- Serial I/O Models 15
- Overlaying I/O Objects 18
- I/O Timing Issues 22
- Information 24
- Multiplexing I/O Models 28
- General I/O Functions 28
- Neuron C Reference Guide 29
- I/O Events 31
- Neuron C Programmer’s Guide 31
- Using Functions or Events 35
- Timer/Counter I/O Models 38
- Output Models 39
- Bit Input/Output 42
- Bit Input Example 45
- Bit Output Example 45
- Byte Input/Output 45
- Byte Input Example 47
- Byte Output Example 48
- Leveldetect Input 48
- Nibble Input/Output 50
- Nibble Input Example 53
- Nibble Output Example 53
- Touch Input/Output 53
- Muxbus Input/Output 62
- Parallel Input/Output 65
- Master Program 71
- Slave Program 72
- Slave B Mode 73
- Token Passing 76
- Handshaking 76
- Transferring Data 76
- Resynchronization Procedure 77
- Using the IRQ Signal 80
- Bitshift Input/Output 86
- Bitshift Input Example 90
- Bitshift Output Example 90
- I2C Input/Output 90
- Magcard Bitstream Input 94
- Magcard Input 96
- Magtrack1 Input 99
- Programming Considerations 100
- Syntax 101
- Example 102
- Neurowire Input/Output 102
- Hardware Considerations 102
- Neurowire Master Mode 103
- Neurowire Slave Mode 104
- SCI (UART) Input/Output 108
- Serial Input/Output 113
- Serial Input Example 117
- Serial Output Example 117
- SPI Input/Output 117
- SPI Master 122
- SPI Master (Neurowire 122
- SPI Slave 123
- Wiegand Input 128
- Timer/Counter Input Models 133
- Dualslope Input 135
- Neuron C Resources 138
- Edgelog Input 139
- Infrared Input 144
- Ontime Input 148
- Period Input 151
- Pulsecount Input 155
- Quadrature Input 158
- Totalcount Input 161
- Timer/Counter Output Models 165
- Edgedivide Output 166
- Frequency Output 169
- Infrared Pattern Output 172
- Oneshot Output 175
- Pulsecount Output 178
- Pulsewidth Output 181
- Stretched Triac Output 184
- Triac Output 189
- Example 1 192
- Example 2 193
- Triggered Count Output 193
- Timer/Counter Periods and 197
- Resolution 197
- InputClock 199
- And so on 200
- Period = 201
- Frequency = 1 / 201
- 196 Index 206
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