![background image](http://html2.mh-extra.com/html/rabbit/6000/6000_user-manual_3115352334.webp)
Rabbit 6000 User’s Manual
digi.com
334
The Quadrature Decoders are clocked by the output of Timer A10, which must be fast enough to sample
the inputs properly. Both the I and Q inputs go through a digital filter that rejects pulses shorter than two
clock periods wide so that highest detectable input frequency is one-fourth of the frequency set by Timer
A10. In addition, the clock rate must be high enough that transitions on the I and Q inputs are sampled in
different clock cycles. Input capture may be used to measure the pulse width on the I inputs because they
come from the odd-numbered port bits. The operation of the digital filter is shown below.
The Quadrature Decoder generates an interrupt when the counter increments from 0xFF (0x3FF in 10-bit
mode) to 0x00, or when the counter decrements from 0x00 to 0xFF (0x3FF in 10-bit mode). The timing
for the interrupt is shown below. Note that the status bits in the QDCSR are set coincident with the inter-
rupt, and the interrupt and status bits are cleared by reading the QDCSR.
Содержание 6000
Страница 1: ...Rabbit 6000 Microprocessor User s Manual 90001108_J...
Страница 11: ...Rabbit 6000 User s Manual digi com 11 1 3 Block Diagram Figure 1 1 Rabbit 6000 Block Diagram...
Страница 43: ...Rabbit 6000 User s Manual digi com 43 4 1 1 Block Diagram...
Страница 57: ...Rabbit 6000 User s Manual digi com 57 5 1 1 Block Diagram...
Страница 88: ...Rabbit 6000 User s Manual digi com 88 7 2 Block Diagram...
Страница 115: ...Rabbit 6000 User s Manual digi com 115 11 1 1 Block Diagram...
Страница 127: ...Rabbit 6000 User s Manual digi com 127 12 1 1 Block Diagram...
Страница 138: ...Rabbit 6000 User s Manual digi com 138 13 1 1 Block Diagram...
Страница 154: ...Rabbit 6000 User s Manual digi com 154 15 1 1 Block Diagram...
Страница 163: ...Rabbit 6000 User s Manual digi com 163 16 1 1 Block Diagram...
Страница 170: ...Rabbit 6000 User s Manual digi com 170 17 1 1 Block Diagram...
Страница 177: ...Rabbit 6000 User s Manual digi com 177 18 1 1 Block Diagram...
Страница 186: ...Rabbit 6000 User s Manual digi com 186 19 1 1 Block Diagram...
Страница 230: ...Rabbit 6000 User s Manual digi com 230 22 2 Block Diagram...
Страница 234: ...Rabbit 6000 User s Manual digi com 234 Figure 22 3 Sample Slow A D Converter Circuit...
Страница 287: ...Rabbit 6000 User s Manual digi com 287 25 1 1 Block Diagram...
Страница 310: ...Rabbit 6000 User s Manual digi com 310 26 1 1 Block Diagram...
Страница 323: ...Rabbit 6000 User s Manual digi com 323 28 1 1 Block Diagram...
Страница 351: ...Rabbit 6000 User s Manual digi com 351 31 1 4 Block Diagram...
Страница 361: ...Rabbit 6000 User s Manual digi com 361 32 1 1 Block Diagram...
Страница 369: ...Rabbit 6000 User s Manual digi com 369 33 2 Block Diagram...
Страница 390: ...Rabbit 6000 User s Manual digi com 390 35 1 1 Block Diagram...
Страница 408: ...Rabbit 6000 User s Manual digi com 408...
Страница 410: ...Rabbit 6000 User s Manual digi com 410...
Страница 411: ...Rabbit 6000 User s Manual digi com 411...
Страница 420: ...Rabbit 6000 User s Manual digi com 420 Figure 37 1 Memory Read and Write Cycles...