PXS20RM Datasheet, PDF (686/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Flexible Motor Control Pulse Width Modulator Module (FlexPWM)
• 10 = Submodule 0’s clock (AUX_CLK) is used as the source clock for the local prescaler and
counter. This setting should not be used in submodule 0 as it will force the clock to logic 0.
• 11 = reserved
25.4.3.4 Control 1 Register (CTRL1)
PWM_SUB
_BASE+$6
0
Read
Write
Reset
0
12
LDFQ
00
3 4 5 6 7 8 9 10 11
HAL
F
FULL
DT
0
PRSC
001000000
Figure 25-38. Control 1 Register (CTRL1)
12 13 14 15
0 _LD- 0 DBL
MOD
EN
0000
LDFQ - Load Frequency
These buffered read/write bits select the PWM load frequency according to Table 25-4. Reset clears
the LDFQ bits, selecting loading every PWM opportunity. A PWM opportunity is determined by the
HALF and FULL bits.
NOTE
The LDFQx bits take effect when the current load cycle is complete
regardless of the state of the LDOK bit. Reading the LDFQx bits reads the
buffered values and not necessarily the values currently in effect.
Table 25-4. PWM Reload Frequency
LDFQ
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
PWM reload frequency
Every PWM opportunity
Every 2 PWM opportunities
Every 3 PWM opportunities
Every 4 PWM opportunities
Every 5 PWM opportunities
Every 6 PWM opportunities
Every 7 PWM opportunities
Every 8 PWM opportunities
Every 9 PWM opportunities
Every 10 PWM opportunities
Every 11 PWM opportunities
Every 12 PWM opportunities
Every 13 PWM opportunities
Every 14 PWM opportunities
Every 15 PWM opportunities
Every 16 PWM opportunities
25-40
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor