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STR720 Datasheet(PDF) 83 Page - STMicroelectronics

Part # STR720
Description  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 Datasheet(HTML) 83 Page - STMicroelectronics

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STR720 - DMA CONTROLLER (DMAC)
83/401
The DMA FIFO block consists of a 16 32-bit words deep FIFO plus Data Pack and Data
Unpack units. The purpose of the FIFO block is to accommodate bus latency and burst length,
and to perform any packing or unpacking operations on the data that may be necessary to
accommodate different data-out/data-in width ratios.
DMA Request 3 is multiplexed with 2 internal request signals which can be used for a memory
to memory data transfer. To allow their use, the ‘Mem2Mem’ bit in the control register must be
Figure 10. DMA Controller block diagram
Interrupt
Logic
AHB bus
FIFO
APB Slave Interface
Control
Logic
AHB Master Interface
DMA Requests
2
3
Interrupt
Request
to EIC
Data Stream 2
Registers
Data Stream 3
Registers
APB bus
1



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