RM46L450
RM46L850
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SPNS184 –SEPTEMBER 2012
Table 5-7. eCAPx Clock Enable Control
ePWM Module Instance
Control Register to Enable Clock
PINMMR39[0]
Default Value
eCAP1
eCAP2
eCAP3
eCAP4
eCAP5
eCAP6
1
1
1
1
1
1
PINMMR39[8]
PINMMR39[16]
PINMMR39[24]
PINMMR40[0]
PINMMR40[8]
The default value of the control registers to enable the clocks to the eCAPx modules is 1. This means that
the VCLK4 clock connections to the eCAPx modules are enabled by default. The application can choose
to gate off the VCLK4 clock to any eCAPx module individually by clearing the respective control register
bit.
5.2.2 PWM Output Capability of eCAPx
When not used in capture mode, each of the eCAPx modules can be used as a single-channel PWM
output. This is called the auxiliary PWM (APWM) mode of operation of the eCAP modules. Refer to the
eCAP chapter of the device Technical Reference Manual for more information.
5.2.3 Input Connection to eCAPx Modules
The input connection to each of the eCAP modules can be selected between a double-VCLK4-
synchronized input or a double-VCLK4-synchronized and filtered input, as shown in Table 5-8.
Table 5-8. Device-Level Input Connection to eCAPx Modules
Input Signal
Control for Double-Synchronized Connection to
eCAPx
Control for Double-Synchronized and Filtered
Connection to eCAPx
eCAP1
eCAP2
eCAP3
eCAP4
eCAP5
eCAP6
PINMMR43[0] = 1
PINMMR43[8] = 1
PINMMR43[16] = 1
PINMMR43[24] = 1
PINMMR44[0] = 1
PINMMR44[8] = 1
PINMMR43[0] = 0 AND PINMMR43[1] = 1
PINMMR43[8] = 0 AND PINMMR43[9] = 1
PINMMR43[16] = 0 AND PINMMR43[17] = 1
PINMMR43[24] = 0 AND PINMMR43[25] = 1
PINMMR44[0] = 0 AND PINMMR44[1] = 1
PINMMR44[8] = 0 AND PINMMR44[9] = 1
5.2.4 Enhanced Capture Module (eCAP) Timings
Table 5-9. eCAPx Timing Requirements
PARAMETER
TEST CONDITIONS
MIN
MAX
MAX
UNIT
cycles
cycles
tw(CAP)
Capture input pulse width
Synchronous
2 tc(VCLK4)
Synchronous, with input 2 tc(VCLK4) + filter width
filter
Table 5-10. eCAPx Switching Characteristics
PARAMETER
TEST CONDITIONS
MIN
UNIT
tw(APWM)
Pulse duration, APWMx output high or low
20
ns
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Peripheral Information and Electrical Specifications
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