EP9312-CB Cirrus Logic Inc, EP9312-CB Datasheet - Page 747

• 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
WAIT FOR TOUCH PRESS
SETTLING TIME FOR KEY
PRESET SETTLING TIME
MAX,MIN,AND AVERAGE
DISCHARGE ALL FOR
DELAY FOR PRESET
APPLY VOLTAGE TO
SAMPLES STORING
TAKE 4,8,16,OR 32
SETTLING TIME
SCAN X-AXIS
DETECTION
START
X-AXIS
Figure 25-4. Analog Resistive Touch Screen Scan Flow Chart
ABS(X-XLAST) LESS
X INT PENDING?
SET X INT PENDING
GREATER THAN
ABS(MAX-MIN)
ABS(X-XLAST)
LESS THAN X
THAN XMIN?
DEVIATION
or DEVTMR
XMAX?
XLAST = X
carry?
Y
N
N
Y
Copyright 2007 Cirrus Logic
Y
Y
N
N
N
ABS(Y-YLAST) LESS
Y INT PENDING?
SET Y INT PENDING
GREATER THAN
ABS(MAX-MIN)
ABS(Y-YLAST)
LESS THAN Y
THAN YMIN?
DEVIATION
or DEVTMR
YLAST = Y
YMAX?
carry?
Y
N
N
Y
Analog Touch Screen Interface
Y
Y
SET INTERRUPT
N
YLAST = Y
PRESET SETTLING TIME
MAX,MIN,AND AVERAGE
SET X INT PENDING
DISCHARGE ALL FOR
APPLY VOLTAGE TO
DELAY FOR PRESET
SAMPLES STORING
TAKE 4,8,16,OR 32
EP93xx User’s Guide
SETTLING TIME
XLAST = X
SCAN Y-AXIS
Y-AXIS
X INT PENDING?
N
25-9
Y
25