SAM9G15 Atmel Corporation, SAM9G15 Datasheet - Page 486
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SAM9G15
Manufacturer Part Number
SAM9G15
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G15.pdf
(1211 pages)
5.SAM9G15.pdf
(45 pages)
Specifications of SAM9G15
Flash (kbytes)
0 Kbytes
Pin Count
217
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
105
Ext Interrupts
105
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
3
Uart
6
Lin
4
Ssc
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
DDR2/LPDDR, SDRAM/LPSDR
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
0.9 to 1.1
Fpu
No
Mpu / Mmu
No/Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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486
Multi-buffer Transfer with Linked List for Source and Linked List for Destination (Row 4)
SAM9G35
SAM9G35
4. After the DMAC selected channel has been programmed, enable the channel by writing
5. Source and destination request single and chunk DMAC transactions to transfer the
6. Once the transfer completes, hardware sets the interrupts and disables the channel. At
1. Read the Channel Enable register to choose a free (disabled) channel.
2. Set up the chain of Linked List Items (otherwise known as buffer descriptors) in mem-
3. Write the channel configuration information into the DMAC_CFGx register for
4. Make sure that the LLI.DMAC_CTRLBx register locations of all LLI entries in memory
– ii. If the hardware handshaking interface is activated for the source or destination
g. If source picture-in-picture mode is enabled (DMAC_CTRLBx.SRC_PIP is
h. If destination picture-in-picture mode is enabled (DMAC_CTRLBx.DST_PIP is
a ‘1’ to the DMAC_CHER.ENABLE[n] bit, where n is the channel number. Make sure
that bit 0 of DMAC_EN.ENABLE register is enabled.
buffer of data (assuming non-memory peripherals). The DMAC acknowledges at the
completion of every transaction (chunk and single) in the buffer and carry out the buffer
transfer.
this time you can either respond to the buffer Complete or Transfer Complete interrupts,
or poll for the Channel Handler Status Register (DMAC_CHSR.ENABLE[n]) bit until it is
cleared by hardware, to detect when the transfer is complete.
ory. Write the control information in the LLI.DMAC_CTRLAx and LLI.DMAC_CTRLBx
registers location of the buffer descriptor for each LLI in memory (see
page
a. Set up the transfer type (memory or non-memory peripheral for source and desti-
b. Set up the transfer characteristics, such as:
– i. Transfer width for the source in the SRC_WIDTH field.
– ii. Transfer width for the destination in the DST_WIDTH field.
– iii. Source AHB master interface layer in the SIF field where source resides.
– iv. Destination AHB master interface layer in the DIF field where destination resides.
– v. Incrementing/decrementing or fixed address for source in SRC_INCR field.
– vi. Incrementing/decrementing or fixed address for destination DST_INCR field.
channel x.
a. Designate the handshaking interface type (hardware or software) for the source
b. If the hardware handshaking interface is activated for the source or destination
(except the last) are set as shown in Row 4 of
LLI.DMAC_CTRLBx register of the last Linked List Item must be set as described in
peripheral, assign a handshaking interface to the source and destination peripheral.
This requires programming the SRC_PER and DST_PER bits, respectively.
enabled), program the DMAC_SPIPx register for channel x.
enabled), program the DMAC_DPIPx register for channel x.
nation) and flow control device by programming the FC of the DMAC_CTRLBx
register.
and destination peripherals. This is not required for memory. This step requires pro-
gramming the SRC_H2SEL/DST_H2SEL bits, respectively. Writing a ‘1’ activates
the hardware handshaking interface to handle source/destination requests for the
specific channel. Writing a ‘0’ activates the software handshaking interface to han-
dle source/destination requests.
peripheral, assign the handshaking interface to the source and destination periph-
eral. This requires programming the SRC_PER and DST_PER bits, respectively.
488) for channel x. For example, in the register, you can program the following:
Table 31-3 on page
483. The
Figure 31-6 on
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
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