SAM9G15 Atmel Corporation, SAM9G15 Datasheet - Page 932

• Manufacturer Part Number: SAM9G15
• Manufacturer: Atmel Corporation

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

41.7.10.4
Figure 41-15. Buffer Structure with and without pen detection enabled
932
trig.event1
trig.event2
trig.eventN
trig.eventN+1
Assuming ADC_TSMR(TSMOD) = 1, PENDET = 1
ADC_TSMR(TSAV) = ADC_TSMR(TSFREQ) = 0
ADC_CHSR = 0x000_0100 , ADC_EMR(TAG) = 1
DMA buffer
Structure
SAM9G35
Pen Detection Status
8
0
1
8
0
1
8
0
0
8
0
0
If the pen detection measure is enabled (PENDET is set in ADC_TSMR register), the XPOS,
YPOS, Z1, Z2 values transmitted to the buffer through ADC_LCDR register are cleared (includ-
ing the CHNB field), if the PENS flag of ADC_ISR register is 0. When the PENS flag is set,
XPOS, YPOS, Z1, Z2 are normally transmitted.
Therefore, using pen detection together with tag function eases the post-processing of the buf-
fer, especially to determine which touchscreen converted values correspond to a period of time
when the pen was in contact with the screen.
When the pen detection is disabled or the tag function is disabled, XPOS, YPOS, Z1, Z2 are nor-
mally transmitted without tag and no relationship can be found with pen status, thus post-
processing may not be easy.
2 successive tags
cleared => PENS = 0
ADC_CDR8
ADC_XPOSR
ADC_YPOSR
ADC_CDR8
ADC_XPOSR
ADC_YPOSR
ADC_CDR8
0
0
ADC_CDR8
0
0
Base Address (BA)
BA + 0x02
BA + 0x04
BA + 0x06
BA + 0x08
BA + 0x0A
BA + [(N-1) * 6]
BA + [(N-1) * 6]+ 0x02
BA + [(N-1) * 6]+ 0x04
DMA Transfer
trig.event1
trig.event2
trig.eventN
Assuming ADC_TSMR(TSMOD) = 1, PENDET = 1
ADC_TSMR(TSAV) = ADC_TSMR(TSFREQ) = 0
ADC_CHSR = 0x000_0100 , ADC_EMR(TAG) =0
DMA buffer
Structure
ADC_XPOSR*, ADC_YPOSR* can b
any value when PENS = 0
0
0
0
0
0
0
0
0
0
0
0
0
ADC_CDR8
ADC_XPOSR
ADC_YPOSR
ADC_CDR8
ADC_XPOSR
ADC_YPOSR
ADC_CDR8
ADC_XPOSR*
ADC_YPOSR*
ADC_CDR8
ADC_XPOSR*
ADC_YPOSR*
11053B–ATARM–22-Sep-11