Enhanced Modular Input/Output Subsystem (eMIOS)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
16-44
Freescale Semiconductor
shows how the unified channel can be used to accumulate high time.
Figure 16-31. Windowed Programmable Time Accumulation Example
16.4.4.4.11
Modulus Counter Mode (MC)
The following table lists the modulus counter settings:
Table 16-23. MC Operating Modes
MODE[0:6]
Unified Channel MC Operating Mode
0b0010000
Modulus counter. Up counter, internal clock source.
0b0010001
Modulus counter. Up counter, external clock source.
0b0010010–0b0010011
Reserved
0b0010100
Modulus counter. Up/down counter, no change in counter direction upon
match of input counter and register B1, internal clock source.
0b0010101
Modulus counter. Up/down counter, no change in counter direction upon
match of input counter and register B1, external clock source.
A1 match
Selected
counter bus
0x000100 0x000100
0x003000
B1 Value
3
0x001500
0x004200
0x001500
0xFFFFFF
Time
FLAG
set event
EDPOL = 1
B1 match
A1 Value
2
Notes:
1
After input filter.
2
Writing EMIOS_CADR
n
writes to A1.
3
Writing EMIOS_CBDR
n
writes to B1.
Time
0x000000
Input signal
1
B1 match
A1 and B1
Write
0x003000
0x004200
A1 and B1
Write
A1 match
accumulator
(EMIOS_CCNTR)
0x000100
0x004200
0x001500
0x003000
4
Reading EMIOS_ALTA
n
returns the value of A2. (EMIOS_ALTA only used in PEC and WPTA modes)
A2 Value
4
EMIOS_CCNTR
n
A2
EMIOS_CCNTR
n
A2
Содержание MPC5565
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