AT91SAM9263B-CU Atmel, AT91SAM9263B-CU Datasheet - Page 274
AT91SAM9263B-CU
Manufacturer Part Number
AT91SAM9263B-CU
Description
IC ARM9 MCU 200 MHZ 324-TFBGA
Manufacturer
Atmel
Series
AT91SAMr
Specifications of AT91SAM9263B-CU
Core Processor
ARM9
Core Size
16/32-Bit
Speed
240MHz
Connectivity
CAN, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
AC'97, LCD, POR, PWM, WDT
Number Of I /o
160
Program Memory Size
128KB (128K x 8)
Program Memory Type
ROM
Ram Size
128K x 8
Voltage - Supply (vcc/vdd)
1.08 V ~ 1.32 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
324-TFBGA
Processor Series
AT91SAMx
Core
ARM926EJ-S
Data Bus Width
32 bit
Data Ram Size
96 KB
Interface Type
2-Wire, EBI, I2S, MCI, SPI, USART
Maximum Clock Frequency
200 MHz
Number Of Programmable I/os
160
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
AT91SAM-ICE, AT91-ISP, AT91SAM9263-EK
Minimum Operating Temperature
- 40 C
Package
324TFBGA
Device Core
ARM926EJ-S
Family Name
91S
Maximum Speed
200 MHz
Operating Supply Voltage
1.8|2.5|3.3 V
Controller Family/series
AT91SAM9xxx
No. Of I/o's
160
Ram Memory Size
96KB
Cpu Speed
240MHz
No. Of Timers
1
Rohs Compliant
Yes
For Use With
AT91SAM9263-EK - KIT EVAL FOR AT91SAM9263AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
Q3735625
Available stocks
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Price
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25.3.3.3
25.3.3.4
25.3.3.5
274
AT91SAM9263
Single Transactions
External DMA Request Definition
Hardware Handshaking
Y o u c a n w r i te a 1 t o th e D M A C _ S gl R e q S rc R eg [ x ]/ D M A C _ S g l R e qD s tR e g [x ] a n d
DMAC_ReqSrcReg[x]/DMAC_ReqDstReg[x] registers in any order, but both registers must be
asserted in order to initiate a burst transaction. Upon completion of the burst transaction, the
h a r d w a r e c l e a r s t h e D M A C _ S g l R e q S r c R e g [ x ] / D M A C _ S g l R e q D s t R e g [ x ] a n d
DMAC_ReqSrcReg[x]/DMAC_ReqDstReg[x] registers.
Writing a 1 to the DMAC_SglReqSrcReg/DMAC_SglReqDstReg initiates a single transaction.
U p o n
DMAC_SglReqSrcReg/DMAC_SglReqDstReg and DMAC_ReqSrcReg/DMAC_ReqDstReg bits
are cleared by hardware. Therefore, writing a 1 to the DMAC_ReqSrcReg/DMAC_ReqDstReg is
ignored while a single transaction has been initiated, and the requested burst transaction is not
serviced.
Again, writing a 1 to the DMAC_ReqSrcReg/DMAC_ReqDstReg register is always a burst trans-
action request. However, in order for a burst transaction request to start, the corresponding
channel bit in the DMAC_SglReqSrcReg/DMAC_SglReqDstReg must be asserted. Therefore, to
e n s u r e t h a t a b u r s t t r a n s a c t i o n i s s e r v i c e d , y o u m u s t w r i t e a 1 t o t h e
D M A C _ R e q S r c R e g / D M A C _ R e q D s t R e g
DMAC_SglReqSrcReg/DMAC_SglReqDstReg register.
Software can poll the relevant channel bit in the DMAC_SglReqSrcReg/ DMAC_SglReqDstReg
and DMAC_ReqSrcReg/DMAC_ReqDstReg registers. When both are 0, then either the
requested burst or single transaction has completed. Alternatively, the IntSrcTran or IntDstTran
interrupts can be enabled and unmasked in order to generate an interrupt when the requested
source or destination transaction has completed.
Note:
There are 5 hardware handshaking interfaces connected to four external DMA requests (see
Table
Table 25-1.
When an external slave peripheral requires the DMAC to perform DMA transactions, it communi-
cates its request by asserting the external nDMAREQx signal. This signal is resynchronized to
ensure a proper functionality (see
The external nDMAREQx is asserted when the source threshold level is reached. After resyn-
chronization, the rising edge of dma_req starts the transfer. dma_req is de-asserted when
dma_ack is asserted.
Request
DMAREQ0
DMAREQ1
DMAREQ2
DMAREQ3
25-1).
The transaction-complete interrupts are triggered when both single and burst transactions are
complete. The same transaction-complete interrupt is used for both single and burst transactions.
c o m p l e t i o n
Hardware Handshaking Connection
Definition
External DMA Request 0
External DMA Request 1
External DMA Request 2
External DMA Request 3
o f
Figure 25-4 on page
t h e
s i n g l e
b e f o r e
275).
t r a n s a c t i o n ,
w r i t i n g
Hardware Handshaking
a
6249H–ATARM–27-Jul-09
Interface
1
b o t h
1
2
3
4
t o
t h e
t h e
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