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Chapter 20 Pulse Width Modulator with Fault Protection (PMF15B6C) Module
MC9S12XF - Family Reference Manual, Rev.1.19
920
Freescale Semiconductor
20.3.2.18 PMF Value 4 Register (PMFVAL4)
Read and write anytime.
20.3.2.19 PMF Value 5 Register (PMFVAL5)
Read and write anytime.
Table 20-21. PMFVAL3 Field Descriptions
Field
Description
15–0
PMFVAL3
PMF Value 3 Bits — The 16-bit signed value in this buffered register is the pulse width in PWM3 clock period.
A value less than or equal to zero deactivates the PWM output for the entire PWM period. A value greater than,
or equal to the modulus, activates the PWM output for the entire PWM period. See Table 20-36. The terms
activate and deactivate refer to the high and low logic states of the PWM output.
Note: PMFVAL3 is buffered. The value written does not take effect until the LDOK bit is set and the next PWM
load cycle begins. Reading PMFVAL3 reads the value in the buffer and not necessarily the value the PWM
generator is currently using.
Address: $0018
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
PMFVAL4
W
Reset
0
0000000
Figure 20-24. PMF Value 4 Register (PMFVAL4)
Table 20-22. PMFVAL4 Field Descriptions
Field
Description
15–0
PMFVAL4
PMF Value 4 Bits — The 16-bit signed value in this buffered register is the pulse width in PWM4 clock period.
A value less than or equal to zero deactivates the PWM output for the entire PWM period. A value greater than,
or equal to the modulus, activates the PWM output for the entire PWM period. See Table 20-36. The terms
activate and deactivate refer to the high and low logic states of the PWM output.
Note: PMFVAL4 is buffered. The value written does not take effect until the LDOK bit is set and the next PWM
load cycle begins. Reading PMFVAL4 reads the value in the buffer and not necessarily the value the PWM
generator is currently using.
Address: $001A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
PMFVAL5
W
Reset
0
0000000
Figure 20-25. PMF Value 5 Register (PMFVAL5)