EP9312-IB Cirrus Logic Inc, EP9312-IB Datasheet - Page 266

• Manufacturer Part Number: EP9312-IB
• Description: IC ARM920T MCU 200MHZ 352-PBGA
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9312-IB

• 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: -40°C ~ 85°C
• Package / Case: 352-BGA
• 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: 598-1259

8
8-2
Graphics Accelerator
EP93xx User’s Guide
8.2.1 Copy
8.2.1.1 Transparency
8.2.1.2 Logical Mask
8.2.1.3 Logical Destination
8.2.1.4 Operation Precedence
It is possible to copy data from the source memory to the destination memory using the copy
form of block transfer. A copy is accomplished by not enabling any of the data path options,
i.e. Transparency, Logical Mask, or Destination Mask.
Transparency is used to preserve pixels in the destination memory. When a pixel in the
source block is defined as a transparent pixel, the corresponding destination pixel will be left
un-modified by the block transfer. A pixel is defined as transparent when it matches the pixel
value that is loaded into the TRANSPATTRN register. Comparisons are made based on the
bits per pixel mode of the transfer.
Logical Mask is used to manipulate the pixel data as it is copied from the source location to
the destination. The source data will not be modified unless the source is also the destination.
All pixel data is manipulated based on the value of the
desired operation. The operations, using “C” syntax, of Logical Mask are:
Logical Destination provides for the modification of the destination data based on the value of
the source pixels. The operations, using “C” syntax, of Logical Destination are:
The order of precedence is:
1. Logical Mask
AND - This operator is used to remove pattern attributes from a pixel.
OR - This operator may be used to add regular pattern attributes to a pixel.
XOR - This operator is used for pixel bit plane inversion.
AND - This operator is used to remove pattern attributes from a pixel.
OR - This operator is used to add regular pattern attributes to a pixel.
XOR - This operator is used for pixel bit plane inversion.
Dest = BLOCKMASK & Src;
Dest = BLOCKMASK | Src;
Dest = BLOCKMASK ^ Src; (where ^ is an XOR operation)
Dest = Dest & Src;
Dest = Dest | Src;
Dest = Dest ^ Src; (where ^ is an XOR operation)
Copyright 2007 Cirrus Logic
“BLOCKMASK”
register and the
DS785UM1