RM46L852
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SPNS185 –SEPTEMBER 2012
5.6.7 High-End Timer Transfer Unit (HET-TU)
A High End Timer Transfer Unit (HET-TU) 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.
5.6.7.1 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 byte or 16 byte) and system memory address (fixed, 32 bit or
64bit)
• One shot, circular and auto switch buffer transfer modes
• Request lost detection
5.6.7.2 Trigger Connections
Table 5-24. 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 5-25. 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]
Copyright © 2012, Texas Instruments Incorporated Peripheral Information and Electrical Specifications 141
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