BU21021GUL Datasheet, PDF (5/13 Pages) Rohm – 4-wire resistive Touch Screen Controller

BU21021GUL
●Block Diagram
Datasheet
Figure 4. Block Diagram
●Description of Blocks
Screen-I/F
: 4-wire touch screen interface
ADC
: 12-bit SAR A/D converter
OSC
: 20MHz oscillator for internal block
Regulator
: Internal power supply.
DVDD can be supplied from external
Clock generator : System clock and internal timing generation
CPU
: Noise filtering, dual touch detection and touch coordinates generation
Work memory : CPU work memory
Program memory : CPU program memory
EEPROM-I/F : External EEPROM-I/F for CPU program memory downloads
Host-I/F
: 4-wire SPI I/F / 2-wire serial bus I/F
Filter
: Median average filter (Maximum 16 data)
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TSZ22111・15・001
5/10
TSZ02201-0Y1Y0F300060-1-2
19.Jun.2012 Rev.001