Texas Instruments TMS320 2806 Series, Technical Reference Manual

Page: 248 / 1141

Table 3-1. ePWM Module Control and Status Register Set Grouped by Submodule (continued)
Name Offset
(1)
Size
(x16) Shadow EALLOW Description
HRMSTEP 0x0026 1 Yes HRPWM MEP Step Register
(3) (4)
HRPCTL 0x0028 1 Yes High Resolution Period Control Register
(3)
TBPRDHRM 0x002A 1 Writes Time Base Period High Resolution Register Mirror
(3)
TBPRDM 0x002B 1 Writes Time Base Period Register Mirror
CMPAHRM 0x002C 1 Writes Compare A High Resolution Register Mirror
(3)
CMPAM 0x002D 1 Writes Compare A Register Mirror
Digital Compare Event Registers
DCTRIPSEL 0x0030 1 Yes Digital Compare Trip Select Register
DCACTL 0x0031 1 Yes Digital Compare A Control Register
DCBCTL 0x0032 1 Yes Digital Compare B Control Register
DCFCTL 0x0033 1 Yes Digital Compare Filter Control Register
DCCAPCTL 0x0034 1 Yes Digital Compare Capture Control Register
DCFOFFSET 0x0035 1 Writes Digital Compare Filter Offset Register
DCFOFFSETCNT 0x0036 1 Digital Compare Filter Offset Counter Register
DCFWINDOW 0x0037 1 Digital Compare Filter Window Register
DCFWINDOWCNT 0x0038 1 Digital Compare Filter Window Counter Register
DCCAP 0x0039 1 Yes Digital Compare Counter Capture Register
(1) Locations not shown are reserved.
(2) These registers are only available on ePWM instances that include the high-resolution PWM extension. Otherwise these locations are
reserved. These registers are also described in
Chapter 4 . See your device-specific data sheet to determine which instances include
the HRPWM.
(3) EALLOW protected registers as described in the System Control and Interrupts chapter.
(4) These registers only exist in the ePWM1 register space. They cannot be accessed from any other ePWM module's register space.
The CMPA , CMPAHR, TBPRD, and TBPRDHR registers are mirrored in the register map (Mirror registers
include an "-M" suffix - CMPAM, CMPAHRM, TBPRDM, and TBPRDHRM). Note in the tables below, that in both
Immediate mode and Shadow mode, reads from these mirror registers result in the active value of the register or
a TI internal test value.
In Immediate Mode:
Register Offset Write Read Register Offset Write Read
TBPRDHR 0x06 Active Active TBPRDHRM 0x2A Active TI_Internal
TBPRD 0x05 Active Active TBPRDM 0x2B Active Active
CMPAHR 0x08 Active Active CMPAHRM 0x2C Active TI_Internal
CMPA 0x09 Active Active CMPAM 0x2D Active Active
In Shadow Mode:
Register Offset Write Read Register Offset Write Read
TBPRDHR 0x06 Shadow Shadow TBPRDHRM 0x2A Shadow TI_Internal
TBPRD 0x05 Shadow Shadow TBPRDM 0x2B Shadow Active
CMPAHR 0x08 Shadow Shadow CMPAHRM 0x2C Shadow TI_Internal
CMPA 0x09 Shadow Shadow CMPAM 0x2D Shadow Active
Enhanced Pulse Width Modulator (ePWM) Module www.ti.com
248 TMS320x2806x Microcontrollers SPRUH18I – JANUARY 2011 – REVISED JUNE 2022
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