EP9312-CB Cirrus Logic Inc, EP9312-CB Datasheet - Page 270

• 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

8
8-6
Graphics Accelerator
EP93xx User’s Guide
8.4.4 Memory Organization for 16-Bits Per Pixel
The 16 bpp storage format can be used to support high color displays. This mode would
typically be used to implement a 5-bit blue, 6-bit green, 5-bit red color scheme or a 5-bit blue,
5-bit green, 5-bit red color scheme. The least significant byte in 16 bpp mode could also be
used in conjunction with the Raster Engine palette to map 256 color selections to 24 bit
colors. With 256 color mapping, the most significant byte for each pixel would not be used for
color information.
every two bytes.
0x000C
0x002C
0x000C
0x001C
0x005C
0x0000
0x0004
0x0008
0x0010
0x0014
0x0028
0x0000
0x0004
0x0008
0x0010
0x0014
0x0018
0x0050
0x0054
0x0058
.....
.....
Table 8-5
31
31
P(3,0)
P(7,0)
P(3,1)
P(7,1)
P(3,2)
P(7,2)
P(3,5)
P(7,5)
Table 8-5. 16 bpp Memory Organization
Table 8-4. 8 bpp Memory Organization
.....
shows how 16 bpp images are stored in memory as 1 pixel for
Copyright 2007 Cirrus Logic
24 23
P(1,0)
P(3,0)
P(5,0)
P(7,0)
P(1,1)
P(3,1)
P(5,1)
P(7,1)
P(1,5)
P(3,5)
P(5,5)
P(7,5)
.....
P(2,0)
P(6,0)
P(2,1)
P(6,1)
P(2,2)
P(6,2)
P(2,5)
P(6,5)
.....
16 15
16 15
P(1,0)
P(5,0)
P(1,1)
P(5,1)
P(1,2)
P(5,2)
P(1,5)
P(5,5)
.....
P(0,0)
P(2,0)
P(4,0)
P(6,0)
P(0,1)
P(2,1)
P(4,1)
P(6,1)
P(0,5)
P(2,5)
P(4,5)
P(6,5)
8 7
.....
P(0,0)
P(4,0)
P(0,1)
P(4,1)
P(0,2)
P(4,2)
P(0,5)
P(4,5)
.....
0
0
DS785UM1