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TMS570LS0714
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SPNS226E –JUNE 2013–REVISED NOVEMBER 2016
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Peripheral Information and Electrical SpecificationsCopyright © 2013–2016, Texas Instruments Incorporated
7.7.7 High-End Timer Transfer Unit (HET)
A High-End Timer Transfer Unit (HTU) can perform DMA type transactions to transfer N2HET data to or
from main memory. A Memory Protection Unit (MPU) is built into the HET TU.
7.7.7.1 Features
• CPU and DMA independent
• Master port to access system memory
• 8 control packets supporting dual buffer configuration
• Control packet information is stored in RAM protected by parity
• Event synchronization (HET transfer requests)
• Supports 32- or 64-bit transactions
• Addressing modes for HET address (8- or 16-byte) and system memory address (fixed, 32- or 64-bit)
• One shot, circular, and auto-switch buffer transfer modes
• Request lost detection
7.7.7.2 Trigger Connections
For the transfer request line trigger connections to the N2HET TU when an instruction-specific condition is
true, see Table 7-28 and Table 7-29.
Table 7-28. HET TU1 Request Line Connection
MODULES REQUEST SOURCE HET TU1 REQUEST
N2HET1 HTUREQ[0] HET TU1 DCP[0]
N2HET1 HTUREQ[1] HET TU1 DCP[1]
N2HET1 HTUREQ[2] HET TU1 DCP[2]
N2HET1 HTUREQ[3] HET TU1 DCP[3]
N2HET1 HTUREQ[4] HET TU1 DCP[4]
N2HET1 HTUREQ[5] HET TU1 DCP[5]
N2HET1 HTUREQ[6] HET TU1 DCP[6]
N2HET1 HTUREQ[7] HET TU1 DCP[7]
Table 7-29. HET TU2 Request Line Connection
MODULES REQUEST SOURCE HET TU2 REQUEST
N2HET2 HTUREQ[0] HET TU2 DCP[0]
N2HET2 HTUREQ[1] HET TU2 DCP[1]
N2HET2 HTUREQ[2] HET TU2 DCP[2]
N2HET2 HTUREQ[3] HET TU2 DCP[3]
N2HET2 HTUREQ[4] HET TU2 DCP[4]
N2HET2 HTUREQ[5] HET TU2 DCP[5]
N2HET2 HTUREQ[6] HET TU2 DCP[6]
N2HET2 HTUREQ[7] HET TU2 DCP[7]
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