EP9312-CB Cirrus Logic Inc, EP9312-CB Datasheet - Page 272

• 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
8-8
Graphics Accelerator
EP93xx User’s Guide
8.4.6 Memory Map Access
8.5.1 Word Count
8.5.1.1 Example: 8 BPP mode
8.5 Register Programming
The Graphics Accelerator has access to the entire memory map. Therefore pixel block
function processing is not limited to graphics and video memory. Font storage, bit map
storage, etc. can be stored anywhere in the memory map. To alleviate page miss penalties
for copies between SDRAM memory pages, the Graphics Accelerator uses a 32-entry copy
buffer during block transfers.
Some of the registers used to operate the Graphics Accelerator need extra explanation for
proper usage. There are two sets such registers. They specify Word Count and Pixel
End/Start values.
The
32-bit words minus 1’ that are to be fetched from the SDRAM buffer. If any pixel bit is in a
word. it must be counted as a full word.
If a Block Copy starts at pixel 0 and 7 pixels are to be copied, the
would be loaded with a 0x1 (2 words - 1 word = 0x1) since the 7th pixel resides in word 1 and
the 0th pixel resides in word 0. The pixels fetched are highlighted in
If a Block Copy starts at pixel 0 and 2 pixels are to be copied, the
would be loaded with 0x0 (1 word - 1 word = 0x0). The pixels fetched are highlighted in
Table
“BLKSRCWIDTH”
0x0000 -
Address
0x000C
8-9.
0x00BC
0x00B0
0x00B4
0x00B8
Table 8-7. 24 bpp Unpacked Memory Organization (1 pixel/ 1 word)
31
FF
EE
DD
and
unused
unused
unused
unused
“BLKDESTWIDTH”
CC
Table 8-8. Transfer Example 1
0 31
Copyright 2007 Cirrus Logic
BB
AA
P(4,5)R
P(5,5)R
P(6,5)R
P(7,5)R
99
88
registers must be written with the ‘number of
0 31
77
66
P(4,5)G
P(5,5)G
P(6,5)G
P(7,5)G
55
44
0 31
“BLKSRCWIDTH”
“BLKSRCWIDTH”
33
Table
22
P(4,5)B
P(5,5)B
P(6,5)B
P(7,5)B
8-8.
11
00
0
DS785UM1
register
register