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| PXN20RM Datasheet, PDF (854/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller | |||
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Enhanced Modular Input/Output Subsystem (eMIOS200)
MODE = 000_10000
EMIOS_CCNTR[n]1
0xFFFFFF
0x001500
write to A1
A1 Match
A1 Match
0x000000
FLAG Pin/Register
Selected Counter Bus
0x000090
Input Signal2
events
A1 events
A1 Value3
A2 Value4
0xxxxxxx
0xxxxxxx
0x001500
B1 Value 0xxxxxxx
B2 Value5 0xxxxxxx 0x000090
Notes: 1. Cleared on the first input event after writing to register A1
2. After input filter
3. EMIOS_CADR[n] = A1 (when writing)
4. EMIOS_CADR[n] = A2 (when reading)
5. EMIOS_CBDR[n] = B1
0x000400
0x001000
no events
0x001500
0x000400
0x000090
0x000400
A1 events
0x001000
0x007000
0x001500
0x007000
0x001000
0x007000
Figure 28-27. Pulse/Edge Accumulation Continuous Mode Example
MODE = 000_10001
EMIOS_CCNTR[n]1
0xFFFFFF
0x001500
write to A1
A1 Match
Time
0x000000
FLAG Pin/Register
Selected Counter Bus
Input Signal2
A1 Value3
A2 Value4
B1 Value
B2 Value5
0x000090
events
0xxxxxxx 0x001500
0xxxxxxx
0xxxxxxx
0xxxxxxx 0x000090
A1 events
0x000400
0x001500
0x000400
0x000090
0x000400
events
Notes: 1. Cleared on the first input event after writing to register A1
2. After input filter
3. EMIOS_CADR[n] = A1 (when writing)
4. EMIOS_CADR[n] = A2 (when reading)
5. EMIOS_CBDR[n] = B1
Figure 28-28. Pulse/Edge Accumulation Single-Shot Mode Example
Time
28.4.1.1.8 Pulse/Edge Counting (PEC) Mode
The PEC mode returns the amount of pulses or edges detected on the input for a desired time window.
MODE[6] bit selects between continuous or single shot operation.
28-32
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor
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