at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 17

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

7.5
Table 7-3.
7.6
6249D–ATARM–20-Dec-07
0
1
2
3
4
5
6
Internal 80 Kbyte
Internal 16 Kbyte
Peripheral Bridge
DMA Controller
USB Host User
LCD Controller
Master to Slave Access
Peripheral DMA Controller
User Interface
User Interface
Internal ROM
External Bus
External Bus
SRAM Bank
Master
Slave
Interface 0
Interface 1
Interface
SRAM
Masters to Slaves Access
In most cases, all the masters can access all the slaves. However, some paths do not make
sense, for example, allowing access from the Ethernet MAC to the Internal Peripherals. Thus,
these paths are forbidden or simply not wired, and are shown as “-” in
OHCI USB
The Peripheral DMA Controller handles transfer requests from the channel according to the fol-
lowing priorities (low to high priorities):
Controller
• Acts as one Matrix Master
• Allows data transfers between a peripheral and memory without any intervention of the
• Next Pointer support, removes heavy real-time constraints on buffer management.
• Twenty channels
Host
processor
X
X
X
X
X
0
-
-
-
-
– Two for each USART
– Two for the Debug Unit
– Two for each Serial Synchronous Controller
– Two for each Serial Peripheral Interface
– Two for the AC97 Controller
– One for each Multimedia Card Interface
– DBGU Transmit Channel
– USART2 Transmit Channel
Interface
Sensor
Image
X
X
X
X
X
1
-
-
-
-
Controller
Graphics
2D
X
X
X
X
X
2
-
-
-
-
Controller
DMA
3
X
X
X
X
X
X
-
-
-
AT91SAM9263 Preliminary
Ethernet
MAC
X
X
X
X
X
4
-
-
-
-
Controller
LCD
X
X
X
X
X
5
-
-
-
-
Table
Peripheral
Controller
DMA
X
X
X
X
X
X
6
-
-
-
7-3.
Instruction
ARM926
Data &
7&8
X
X
X
X
X
X
X
X
X
17