CC-ACC-MMK-2443 Digi International, CC-ACC-MMK-2443 Datasheet - Page 36

• Manufacturer Part Number: CC-ACC-MMK-2443
• Description: MCU, MPU & DSP Development Tools CC9M 2443 Multimedia App Kit
• Manufacturer: Digi International

Specifications of CC-ACC-MMK-2443

• Processor To Be Evaluated: S3C2443
• Data Bus Width: 32 bit
• Interface Type: UART
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A/D converter and
touch screen
interface
Touch screen
interface modes
36
C h a p t e r 1
ConnectCore 9M 2443 Hardware Reference
The 10-bit / 10-channels CMOS ADC (Analog to Digital Converter) converts the analog
input signal into 10-bit binary digital codes at a maximum conversion rate of 500KSPS
with 2.5MHz A/D converter clock. A/D converter operates with on-chip sample-and-
hold function and power down mode is supported.
The touch screen Interface can control/select pads (ConnectCore 9M 2443, XP, XM,
YP, YM) of the Touch Screen for X, Y position conversion. The touch Screen Interface
provides Touch Screen Pads control logic and ADC interface logic with interrupt
generation.
Features:
1. Normal conversion mode
Single Conversion Mode is used for General Purpose ADC Conversion. This mode can
be activated by
2. Separate X/Y position conversion mode is activated as follows:
3. Auto (Sequential) X/Y Position Conversion Mode is activated as follows:
Resolution: 10-bit
Differential linearity error: 1.0 LSB
Integral linearity error: 2.0 LSB
Maximum conversion rate: 500 KSPS
Low power consumption
Power supply voltage: 3.3V
Analog input range: 0 ~ 3.3V
On-chip sample-and-hold function
Normal conversion mode
Separate X/Y position conversion mode
Auto (Sequential) X/Y position conversion mode
Waiting for interrupt mode
1
2
1
2
1
Set the ADCCON (ADC Control Register), and
set the read and write to the ADCDAT0 (ADC Data Register 0).
X-Position Mode writes X-Position Conversion Data to ADCDAT0, so Touch
Screen Interface generates the Interrupt source to Interrupt Controller.
Y-Position Mode writes Y-Position Conversion Data to ADCDAT1, so Touch
Screen Interface generates the Interrupt source to Interrupt Controller.
Touch Screen Controller sequentially converts the X-Position or Y-Position
that is touched.