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SPRUI07–March 2020
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Direct Memory Access (DMA) Module
Table 8-1 shows the interrupt trigger source options that are available for each channel.
(1)
The ePWM1-6 are not present on all devices and/or revisions. See
the TMS320x28xx, 28xxx device Peripheral Reference Guide
(SPRU566) for specifics.
Table 8-1. Peripheral Interrupt Trigger Source Options
Peripheral Interrupt Trigger Source
CPU DMA Software bit
(CHx.CONTROL.PERINTFRC) only
ADC Sequencer 1 Interrupt
Sequencer 2 Interrupt
External Interrupts External Interrupt 1
External Interrupt 2
External Interrupt 3
External Interrupt 4
External Interrupt 5
External Interrupt 6
External Interrupt 7
External Interrupt 13
CPU Timers Timer 0 Overflow
Timer 1 Overflow
Timer 2 Overflow
McBSP-A McBSP-A Transmit Buffer Empty
McBSP-A Receive Buffer Full
McBSP-B McBSP-B Transmit Buffer Empty
McBSP-B Receive Buffer Full
ePWM1
(1)
ADC Start of Conversion A
ADC Start of Conversion B
ePWM2
(1)
ADC Start of Conversion A
ADC Start of Conversion B
ePWM3
(1)
ADC Start of Conversion A
ADC Start of Conversion B
ePWM4
(1)
ADC Start of Conversion A
ADC Start of Conversion B
ePWM5
(1)
ADC Start of Conversion A
ADC Start of Conversion B
ePWM6
(1)
ADC Start of Conversion A
ADC Start of Conversion B
8.2.3 DMA Bus
The DMA bus architecture consists of a 22-bit address bus, a 32-bit data read bus, and a 32-bit data write
bus. Memories and register locations connected to the DMA bus are via interfaces that sometimes share
resources with the CPU memory or peripheral bus. Arbitration rules are defined in Section 8.4. The
following resources are connected to the DMA bus:
• XINTF Zones 0, 6, and 7
• L0-L7 SARAM
• L4 SARAM
• L5 SARAM
• L6 SARAM
• L7 SARAM