EP9312-IBZ Cirrus Logic Inc, EP9312-IBZ Datasheet - Page 746
![IC ARM920T MCU 200MHZ 352-PBGA](/photos/12/23/122390/mfg_ep9312_series_sml.jpg)
EP9312-IBZ
Manufacturer Part Number
EP9312-IBZ
Description
IC ARM920T MCU 200MHZ 352-PBGA
Manufacturer
Cirrus Logic Inc
Series
EP9r
Specifications of EP9312-IBZ
Core Size
16/32-Bit
Package / Case
352-BGA
Core Processor
ARM9
Speed
200MHz
Connectivity
EBI/EMI, EIDE, 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
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
Controller Family/series
(ARM9)
A/d Converter
12 Bits
No. Of I/o Pins
65
Clock Frequency
200MHz
Processor Series
EP93xx
Core
ARM920T
Data Bus Width
32 bit
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Details
Other names
598-1260
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP9312-IBZ
Manufacturer:
CIRRUS
Quantity:
30
Company:
Part Number:
EP9312-IBZ
Manufacturer:
HITTITE
Quantity:
1 200
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25
25-8
Analog Touch Screen Interface
EP93xx User’s Guide
The difference between this new X value and the last valid X value is then compared against
the XMIN value stored in the TSXYMaxMin register (unless the X interrupt pending flag is
set). If the difference is less than this value no action is taken, and the algorithm continues by
discharging and scanning the Y-axis. If the difference between the new X value and the last X
value is greater than the XMIN value, the algorithm continues by comparing the difference
between the new X value and the last X value to the XMAX value in the TSXYMaxMin
register. If the difference is greater than XMAX, it is assumed that this distance is too far for a
touch input to possibly move in the short scan time interval and that the key press is invalid.
However, it is stored as the last recorded X location in case a truly new location is being
determined. The X move interrupt pending flag is also set at this point to cause the algorithm
to skip over the comparison to XMIN on consecutive sample sets. This flag will also cause a
ARM Core interrupt after valid X and Y samples have been established.
The algorithm then starts again, discharging and detecting a valid press. If the difference
between the new X value and the last stored X value is less than the XMAX value, the
algorithm stores the new X value, sets the X move interrupt pending flag and continues by
discharging and scanning a Y-axis value.
scanning process.
The Y-axis scan proceeds in the same fashion as the X-axis scan, except that the switch
matrix is now controlled by the TSYSample register. When the new Y value has been
calculated, the difference between this new Y value and the last valid Y value is then
compared against the YMIN value stored in the TSXYMaxMin register (unless the Y interrupt
pending flag is set). If the difference is less than this value, no Y action is taken and the
algorithm continues by checking the X interrupt pending flag. If this flag is set the Y value is
stored in the Y last register and the interrupt to the ARM Core is generated.
Copyright 2007 Cirrus Logic
Figure 25-4
is the flow chart demonstrating the
DS785UM1
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