Highlight Of Dma Controller; Introduction - Texas Instruments OMAP5910 Technical Reference Manual

Introduction

5.1 Introduction
Figure 5–1. Highlight of DMA Controller
OMAP5910
32
E
Flash and
16 M
SRAM I
F
memories
S
E
16 M
Memory interface
SDRAM
I
memories traffic controller (TC)
F
F
I
M
I
F
32
32
SRAM
1.5M bits
JTAG/
emulation
I/F
5-2
The system direct memory access (DMA) controller transfers data between
points in the memory space without intervention by the MPU. The DMA allows
movements of data to and from internal memory, external memory, and periph-
erals to occur in the background of MPU operation. It is designed to off-load
the block data transfer function from the MPU processor.
Figure 5–1 shows the OMAP5910 device with the DMA controller highlighted.
Figure 5–2 shows the controller in more detail.
TMS320C55x DSP
(Instruction Cache, SARAM,
DARAM, DMA,
DSP
32
MMU H/W accelerators)
32
MPU Bus
32
32
32
System
DMA
32
controller
MPU Core
16
(TI925T)
(Instruction
Cache, Data
Clock and reset management
Cache, MMU)
LCD
I/F
OSC
ETM9
12 MHz
DSP private
Private Peripherals
peripheral bus
16
Interrupt handlers
DSP public (shared) peripheral bus
16
16
MPU
interface
32
MPU
peripheral
32
bridge
32
MPU private peripheral bus
32
MPU Private Peripherals
Level 1/2 Interrupt handlers
OSC Configuration registers
Device identification
Reset External clock
Clock
32 kHz
requests
DSP
Timers (3)
DSP public peripherals
Watchdog Timer
Level 1/2
McBSP1
McBSP3
MCSI1
MCSI2
MPU/DSP shared peripherals
TIPB
Switch
UART3 IrDA
MPU public peripherals
McBSP2
USB Host I/F
MPU public
peripheral bus
USB Function I/F
2
I C
µWire
Camera I/F
MPUIO
32-kHz Timer
PWT
PWL
Keyboard I/F
MMC/SD
LPG x2
Frame adjustment
counter
Timers (3)
HDQ / 1-WIRE
Watchdog Timer
RTC
Mailbox
GPIO I/F
UART1
UART2