參數(shù)資料
型號： TMS320DM355_07
廠商： Texas Instruments, Inc.
英文描述： Digital Media System-on-Chip (DMSoC)
中文描述： 數(shù)字媒體系統(tǒng)芯片（DMSoC）
文件頁數(shù)： 87/158頁
文件大小： 1319K
代理商： TMS320DM355_07
www.ti.com
P
3.14 64-Bit Crossbar Architecture
3.14.1 Crossbar Connections
3.14.2 EDMA Controller
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463B–SEPTEMBER 2007–REVISED OCTOBER 2007
The DM355 uses a 64-bit crossbar architecture to control access between device processors, subsystems
and peripherals. It includes an EDMA Controller consisting of a DMA Transfer Controller (TC) and a DMA
Channel Controller (CC). The TC provides two DMA channels for transfer between slave peripherals. The
CC provides a user and event interface to the EDMA system. It includes up to 64 event channels to which
all system synchronization events can be mapped and 8 auto submit “quick” channels (QDMA). In most
ways, these channels are identical. A channel refers to a specific ‘event’ that can cause a transfer to be
submitted to the TC as a Transfer Request.
There are five transfer masters (TCs have separate read and write connections) connected to the
crossbar; ARM, the Video Processing Sub-system (VPSS), the master peripherals (USB), and two EDMA
transfer controllers. These can be connected to four separate slave ports; ARM, the DDR EMIF, and CFG
bus peripherals. Not all masters may connect to all slaves. Connection paths are indicated by
√
at
intersection points shown in
Table 3-18
Table 3-18. Crossbar Connection Matrix
Slave Module
Config Bus Registers and
Memory
DMA Master
ARM Internal
Memory
MPEG/JPEG
Co-processor
Memory
√
DDR EMIF Memory
ARM
VPSS
DMA Master Peripherals (USB)
EDMA3TC0
EDMA3TC1
√
√
√
√
√
√
√
√
√
√
√
√
√
√
The EDMA controller handles all data transfers between memories and the device slave peripherals on
the DM355 device. These are summarized as follows:
Transfer to/from on-chip memories
–
ARM program/data RAM
–
MPEG/JPEG Co-processor memory
Transfer to/from external storage
–
DDR2 / mDDR SDRAM
–
Asynchronous EMIF
–
OneNAND flash
–
NAND flash
–
Smart Media, SD, MMC, xD media storage
Transfer to/from peripherals
–
ASP
–
SPI
–
I2C
–
PWM
–
RTO
–
GPIO
–
Timer/WDT
–
UART
–
MMC/SD
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Detailed Device Description
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