mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 228

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

FlexTimer Module (FTMV1)
11.4
The following sections describe the FTM features.
The notation used in this document to represent the counters and the generation of the signals is shown in
Figure
11.4.1
FTM module has only one clock domain which is the system clock.
11.4.1.1
The CLKS[1:0] bits in the FTMxSC register select one of four possible clock sources for the FTM counter
or disables the FTM counter, see
selected, and the FTM is in a very low power state.
11-28
Channel (n) output
prescaler counter
Reset
Channel (n) - high-true EPWM
PS[2:0] = 001
FTMxCNTINH:L = 0x0000
FTMxMODH:L = 0x0004
FTMxCnVH:L = 0x0002
FTM counter
W
R
11-25.
Functional Description
Clock Source
0
0
7
Counter Clock Source
0
3
1
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
= Unimplemented or Reserved
0
4
overflow
1
0
0
6
Figure 11-24. FTM Register for Future Use (FTMxRFU)
Figure 11-25. Notation used in the FTM Block Guide
0
0
1
0
Table
1
match
1
5
0
0
0
11-4. After any MCU reset, CLKS[1:0] = 00 so no clock source is
2
1
0
3
1
0
0
4
0
4
overflow
1
0
0
1
0
0
3
0
1
match
1
0
2
1
0
0
2
0
3
1
0
4
overflow
1
Freescale Semiconductor
1
0
0
0
0
1
0
1
1
match
0
0
0
0
2
1