EP9312-CB Cirrus Logic Inc, EP9312-CB Datasheet - Page 271

• Manufacturer Part Number: EP9312-CB
• Description: System-on-Chip Processor
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9312-CB

• Peak Reflow Compatible (260 C): No
• A/d Converter: 12 Bits
• Leaded Process Compatible: No
• No. Of I/o Pins: 65
• Package / Case: 352-BGA
• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LCD, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1257

DS785UM1
8.4.5 Memory Organization for 24-Bits Per Pixel
The 24 bpp packed or unpacked storage formats can be used to support higher color
displays. These modes would typically be used to implement an 8-bit blue, 8-bit green, 8-bit
red color scheme.
pixel for every three bytes.
memory
0x00AC
0x000C
0x007C
0x008C
0x000C
0x001C
0x00A0
0x00A4
0x00A8
0x0000
0x0004
0x0008
0x0010
0x0014
0x0078
0x0080
0x0084
0x0088
0x0000
0x0004
0x0008
0x0010
0x0014
0x0018
0x0020
.....
....
Table 8-7. 24 bpp Unpacked Memory Organization (1 pixel/ 1 word)
Table 8-6. 24 bpp Packed Memory Organization (4 pixel/ 3 words)
Table 8-6
31
31
P(2,0)G
P(3,0)R
P(6,0)G
P(7,0)R
P(2,5)G
P(3,5)R
P(6,5)G
P(7,5)R
P(1,0)B
P(5,0)B
P(1,5)B
P(5,5)B
unused
unused
unused
unused
unused
unused
unused
unused
unused
unused
unused
unused
unused
.....
.....
Table 8-7
shows how 24 bpp packed images are stored in memory as 1
Copyright 2007 Cirrus Logic
24 23
24 23
shows how 24 bpp unpacked images are stored in
P(0,0)R
P(3,0)G
P(4,0)R
P(7,0)G
P(0,5)R
P(3,5)G
P(4,5)R
P(7,5)G
P(0,0)R
P(1,0)R
P(2,0)R
P(3,0)R
P(4,0)R
P(5,0)R
P(6,0)R
P(7,0)R
P(0,1)R
P(0,5)R
P(1,5)R
P(2,5)R
P(3,5)R
P(2,0)B
P(6,0)B
P(2,5)B
P(6,5)B
.....
.....
16 15
16 15
P(0,0)G
P(4,0)G
P(0,5)G
P(4,5)G
P(0,0)G
P(1,0)G
P(2,0)G
P(3,0)G
P(4,0)G
P(5,0)G
P(6,0)G
P(7,0)G
P(0,1)G
P(0,5)G
P(1,5)G
P(2,5)G
P(3,5)G
P(1,0)R
P(3,0)B
P(5,0)R
P(7,0)B
P(1,5)R
P(3,5)B
P(5,5)R
P(7,5)B
.....
.....
8 7
8 7
P(1,0)G
P(5,0)G
P(1,5)G
P(5,5)G
P(0,0)B
P(2,0)R
P(4,0)B
P(6,0)R
P(0,5)B
P(2,5)R
P(4,5)B
P(6,5)R
P(0,0)B
P(1,0)B
P(2,0)B
P(3,0)B
P(4,0)B
P(5,0)B
P(6,0)B
P(7,0)B
P(0,1)B
P(0,5)B
P(1,5)B
P(2,5)B
P(3,5)B
.....
.....
Graphics Accelerator
EP93xx User’s Guide
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8-7
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