MC9S12E64CFUE Datasheet, PDF (351/606 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
Table 11-35. PWM Prescaler B
PRSCB
00
01
10
11
PWM Clock Frequency
f_bus
f_bus/2
f_bus/4
f_bus/8
11.3.2.27 PMF Counter B Register (PMFCNTB)
Module Base + 0x002A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R0
PMFCNTB
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 11-33. PMF Counter B Register (PMFCNTB)
Read anytime and writes have no effect.
Table 11-36. PMFCNTB Field Descriptions
Field
Description
14–0 PMF Counter B — This register displays the state of the 15-bit PWM B counter.
PMFCNTB
11.3.2.28 PMF Counter Modulo B Register (PMFMODB)
Module Base + 0x002C
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R0
W
PMFMODB
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 11-34. PMF Counter Modulo B Register (PMFMODB)
Read anytime and write only if MTG is set.
Table 11-37. PMFMODB Field Descriptions
Field
Description
14–0
PMFMODB
PMF Counter Modulo B — The 15-bit unsigned value written to this register is the PWM period in PWM clock
periods. Do not write a modulus value of zero.
Note: The PWM counter modulo register is buffered. The value written does not take effect until the LDOKB bit
is set and the next PWM load cycle begins. Reading PMFMODB reads the value in the buffer. It is not
necessarily the value the PWM generator B is currently using.
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor
351