NXP Semiconductors K22F series - Page 1003

• The FTM counter is automatically updated with the CNTIN register value by the
selected counting mode.
• When there is a write to CNT register.
• When there is the FTM counter synchronization.
• If (CNT = CNTIN), (CLKS[1:0] = 0:0), and a value different from zero is written to
CLKS[1:0] bits.
• If the channel (n) is in Input Capture mode, (ICRST = 1) and the selected input
capture event occurs in the channel (n) input.
The following figures show these cases.
CPWMS = 0
0x0C
0x0D
0x0E 0x0F
0x00
0x01 0x02
0x03
0x04
0x05
initialization trigger
FTM counter
system clock
CNTIN = 0x0000
MOD = 0x000F
Figure 39-77. Initialization trigger is generated when the FTM counting achieves the
CNTIN register value
CPWMS = 0
0x04
0x05
0x06 0x00
0x01
0x02 0x03
0x04
0x05
0x06
initialization trigger
write to CNT
FTM counter
system clock
CNTIN = 0x0000
MOD = 0x000F
Figure 39-78. Initialization trigger is generated when there is a write to CNT register
Chapter 39 FlexTimer Module (FTM)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 1003