SAM9G10 Atmel Corporation, SAM9G10 Datasheet - Page 644

• Manufacturer Part Number: SAM9G10
• Manufacturer: Atmel Corporation

Specifications of SAM9G10

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 266 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 4
• Ssc: 3
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

646
646
Dithering
SAM9G10
SAM9G10
these modes, 1, 2, 4 or 8 input bits index an entry in the lookup table. The corresponding entry in
the lookup table contains the color or gray shade information for the pixel.
Table 38-8.
The lookup table can be accessed by the host in R/W mode to allow the host to program and
check the values stored in the palette. It is mapped in the LCD controller configuration memory
map. The LUT is mapped as 16-bit half-words aligned at word boundaries, only word write
access is allowed (the 16 MSB of the bus are not used). For the detailed memory map, see
Table 38-15 on page
The lookup table contains 256 16-bit wide entries. The 256 entries are chosen by the program-
mer from the 2
For the structure of each LUT entry, see
Table 38-9.
In STN Monochrome, only the four most significant bits of the red value are used (16 gray
shades). In STN Color, only the four most significant bits of the blue, green and red value are
used (4096 colors).
In TFT mode, all the bits in the blue, green and red values are used. The LCDD unused bits are
tied to 0 when TFT palletized configurations are used (LCDD[18:16], LCDD[9:8], LCDD[2:0]).
The dithering block is used to generate the shades of gray or color when the LCD Controller is
used with an STN LCD Module. It uses a time-based dithering algorithm and Frame Rate Con-
trol method.
The Frame Rate Control varies the duty cycle for which a given pixel is turned on, giving the dis-
play an appearance of multiple shades. In order to reduce the flicker noise caused by turning on
and off adjacent pixels at the same time, a time-based dithering algorithm is used to vary the
pattern of adjacent pixels every frame. This algorithm is expressed in terms of Dithering Pattern
TFT
TFT
STN Mono
STN Mono
STN Color
STN Color
Address
00
01
...
FE
FF
DISTYPE
Red_value_0[4:0]
Red_value_1[4:0]
Red_value_254[4:0]
Red_value_255[4:0]
Palette Configurations
16
Lookup Table Structure in the Memory
possible combinations.
665.
Configuration
PIXELSIZE
1, 2, 4, 8
16, 24
1, 2
4
1, 2, 4, 8
16
Green_value_0[5:0]
Green_value_1[5:0]
Green_value_254[5:0]
Green_value_255[5:0]
Table
Data Output [15:0]
38-9.
Palette
Palletized
Non-palletized
Palletized
Non-palletized
Palletized
Non-palletized
Blue_value_0[4:0]
Blue_value_1[4:0]
Blue_value_254[4:0]
Blue_value_255[4:0]
6462B–ATARM–6-Sep-11
6462B–ATARM–6-Sep-11