TMS570LS1114 datasheet(117/169 Pages) TI1

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TMS570LS1114

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SPNS188B – OCTOBER 2012 – REVISED FEBRUARY 2015

Table 7-7. eCAPx Clock Enable Control

ePWM Module Instance

Control Register to Enable Clock

Default Value

eCAP1

PINMMR39[0]

eCAP2

PINMMR39[8]

eCAP3

PINMMR39[16]

eCAP4

PINMMR39[24]

eCAP5

PINMMR40[0]

eCAP6

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.

7.2.2

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 TMS570LS12x/11x Technical Reference Manual (SPNU515) for more information.

7.2.3

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 7-8.

Table 7-8. Device-Level Input Connection to eCAPx Modules

Input Signal

Control for Double-Synchronized Connection to

Control for Double-Synchronized and Filtered

eCAPx

Connection to eCAPx

eCAP1

PINMMR43[0] = 1

PINMMR43[0] = 0 AND PINMMR43[1] = 1

eCAP2

PINMMR43[8] = 1

PINMMR43[8] = 0 AND PINMMR43[9] = 1

eCAP3

PINMMR43[16] = 1

PINMMR43[16] = 0 AND PINMMR43[17] = 1

eCAP4

PINMMR43[24] = 1

PINMMR43[24] = 0 AND PINMMR43[25] = 1

eCAP5

PINMMR44[0] = 1

PINMMR44[0] = 0 AND PINMMR44[1] = 1

eCAP6

PINMMR44[8] = 1

PINMMR44[8] = 0 AND PINMMR44[9] = 1

7.2.4

Enhanced Capture Module (eCAP) Timings

Table 7-9. eCAPx Timing Requirements

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

tw(CAP)

Capture input pulse width

Synchronous

2 tc(VCLK4)

cycles

Synchronous, with input

2 tc(VCLK4) + filter width

cycles

filter

Table 7-10. eCAPx Switching Characteristics

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

tw(APWM)

Pulse duration, APWMx output high or low

Peripheral Information and Electrical Specifications

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