SAM9G45 Atmel Corporation, SAM9G45 Datasheet - Page 1084
SAM9G45
Manufacturer Part Number
SAM9G45
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G45.pdf
(10 pages)
5.SAM9G45.pdf
(55 pages)
6.SAM9G45.pdf
(1196 pages)
Specifications of SAM9G45
Flash (kbytes)
0 Kbytes
Pin Count
324
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
160
Ext Interrupts
160
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
2
Uart
5
Lin
4
Ssc
2
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
Yes
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
64
Self Program Memory
NO
External Bus Interface
2
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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SAM9G45
Table 45-11
Table 45-11. Dithering Duty Cycle
The duty cycles for gray levels 0 and 15 are 0 and 1, respectively.
The same DP_i register can be used for the pairs for which the sum of duty cycles is 1 (e.g., 1/7
and 6/7). The dithering pattern for the first pair member is the inversion of the one for the
second.
The DP_i registers contain a series of 4-bit patterns. The (3-m)
pixel with horizontal coordinate x = 4n + m (n is an integer and m ranges from 0 to 3) should be
turned on or off in the current frame. The operation is shown by the examples below.
Consider the pixels a, b, c and d with the horizontal coordinates 4*n+0, 4*n+1, 4*n+2 and 4*n+3,
respectively. The four pixels should be displayed in gray level 9 (duty cycle 3/5) so the register
used is DP3_5 =”1010 0101 1010 0101 1111”.
The output sequence obtained in the data output for monochrome mode is shown in
12.
Table 45-12. Dithering Algorithm for Monochrome Mode
Gray Level
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Frame
Number
N
N+1
N+2
N+3
shows the correspondences between the gray levels and the duty cycle.
Pattern
1010
0101
1010
0101
Duty Cycle
1
6/7
4/5
3/4
5/7
2/3
3/5
4/7
1/2
3/7
2/5
1/3
1/4
1/5
1/7
0
Pixel a
ON
OFF
ON
OFF
Pixel b
OFF
ON
OFF
ON
th
bit of the pattern determines if a
Pattern Register
-
DP6_7
DP4_5
DP3_4
DP5_7
DP2_3
DP3_5
DP4_7
~DP1_2
~DP4_7
~DP3_5
~DP2_3
~DP3_4
~DP4_5
~DP6_7
-
Pixel c
ON
OFF
ON
OFF
6438G–ATARM–19-Apr-11
Pixel d
OFF
ON
OFF
ON
Table 45-
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