
Pulse-Width Modulation (PWM) Module
Freescale Semiconductor
26-7
26.2.7
PWM Scale A Register (PWMSCLA)
PWMSCLA is the programmable scale value used in scaling clock A to generate clock SA. Clock SA is
generated with the following equation:
Eqn. 26-1
Any value written to this register causes the scale counter to load the new scale value (PWMSCLA).
Address: 0xFC09_0025 (PWMCTL)
Access: User Read/Write
7
6
5
4
3
2
1
0
R
CON67
CON45
CON23
CON01
PSWAI
PFRZ
0
0
W
Reset:
0
0
0
0
0
0
0
0
Figure 26-7. PWM Control Register (PWMCTL)
Table 26-7. PWMCTL Field Descriptions
Field
Description
7
CON67
Concatenates PWM channels 6 and 7 to form one 16-bit PWM channel.
0 Channels 6 and 7 are separate 8-bit PWMs. There is no PWM 6 output.
1 Concatenate PWM 6 and 7. Channel 6 becomes the high order byte and channel 6 the low order byte. PWMOUT7
is the output for this 16-bit PWM signal, and PWMOUT6 is disabled. The channel 7 clock select, polarity, center align
enable, and enable bits control this concatenated output.
6
CON45
Concatenates PWM channels 4 and 5 to form one 16-bit PWM channel.
0 Channels 4 and 5 are separate 8-bit PWMs. There is no PWM 4 output.
1 Concatenate PWM 4 and 5. Channel 4 becomes the high order byte and channel 5 the low order byte. PWMOUT5
is the output for this 16-bit PWM signal, and PWMOUT4 is disabled. The channel 5 clock select, polarity, center align
enable, and enable bits control this concatenated output.
5
CON23
Concatenates PWM channels 2 and 3 to form one 16-bit PWM channel.
0 Channels 2 and 3 are separate 8-bit PWMs. There is no PWM 2 output.
1 Concatenate PWM 2 and 3. Channel 2 becomes the high order byte and channel 3 the low order byte. PWMOUT3
is the output for this 16-bit PWM signal, and PWMOUT2 is disabled. The channel 3 clock select, polarity, center align
enable, and enable bits control this concatenated output.
4
CON01
Concatenates PWM channels 0 and 1 to form one 16-bit PWM channel.
0 Channels 0 and 1 are separate 8-bit PWMs. There is no PWM 0 output.
1 Concatenate PWM 0 and 1. Channel 0 becomes the high order byte and channel 1 the low order byte. PWMOUT1
is the output for this 16-bit PWM signal, and PWMOUT0 is disabled. The channel 1 clock select, polarity, center align
enable, and enable bits control this concatenated output.
3
PSWAI
PWM stops in doze mode. Disables the input clock to the prescaler while in doze mode.
0 Allow the clock to the prescaler while in doze mode
1 Stop the input clock to the prescaler when the core is in doze mode
2
PFRZ
PWM counters stop in debug mode (BKPT asserted).
0 Allow PWM counters to continue while in debug mode
1 Disable PWM input clock to the prescaler when the core is in debug mode. Useful for emulation as it allows the
PWM function to be suspended.
1–0
Reserved, must be cleared.
Clock SA
Clock A
2
PWMSCLA
×
-----------------------------------------
=
MCF5329 Reference Manual, Rev 3
Содержание MCF5329
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Страница 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
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Страница 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 902: ...Register Memory Map Quick Reference A 26 Freescale Semiconductor MCF5329 Reference Manual Rev 3...