EP9307-CRZR Cirrus Logic Inc, EP9307-CRZR Datasheet - Page 202
EP9307-CRZR
Manufacturer Part Number
EP9307-CRZR
Description
IC Universal Platform ARM9 SOC Prcessor
Manufacturer
Cirrus Logic Inc
Series
EP9r
Specifications of EP9307-CRZR
Core Processor
ARM9
Core Size
16/32-Bit
Speed
200MHz
Connectivity
EBI/EMI, Ethernet, I²C, IrDA, Keypad/Touchscreen, SPI, UART/USART, USB
Peripherals
AC'97, DMA, I²:S, LCD, LED, MaverickKey, POR, PWM, WDT
Number Of I /o
14
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
Package / Case
272-LFBGA
Processor Series
EP93xx
Core
ARM920T
Data Bus Width
32 bit
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
EDB9307A-Z
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Details
Other names
Q5809834A
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP9307-CRZR
Manufacturer:
Cirrus Logic Inc
Quantity:
10 000
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7
7-20
Raster Engine With Analog/LCD Integrated Timing and Interface
EP93xx User’s Guide
The values in between full on and full off are more difficult to determine and depend on the
display characteristics such as persistence, turn on time, and refresh rate. To achieve
difference in shades of gray, it is typical to have more values below the half luminance
average due to the higher sensitivity to luminance variations by the human eye at lower
levels. Other problems that occur with choosing patterns and the operating matrix parameters
are flickering (temporal distortion), walking patterns (spatial distortion), and spatial
interference patterns.
Take, for example, a 50% duty cycle. We could define the matrix as a 4Hx4Vx4F as shown in
Figure
the refresh rate of the display, are likely to see flickering for this shade.
To avoid flickering, it is better to play a spatial trick and turn on every other pixel so that the
eye integrates the on and off pixels between two consecutive frames. However, in the case
given in
grayscale consists of every other column activated. For this case, we would be right back to
the flickering problem shown in
board pattern and displayed a checker board image or almost any other pattern.
7-3. However, we effectively halved the refresh rate of these pixels and, depending on
Figure
7-3, a spatial interference can be caused if an image displayed in this
Figure 7-3. Graphics Matrix for 50% Duty Cycle
Frame 0
Frame 2
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Copyright 2007 Cirrus Logic
Figure
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7-4. This would be true if we switched to a checker
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Frame 1
Frame 3
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DS785UM1
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