BU21024FV-M_14 Datasheet, PDF (4/20 Pages) Rohm – Resistive Type Touch Screen Controller ICs

BU210243FGVU-LM BU21023MUV BU21024FV-M
Block Diagram and Description of each Block
Datasheet
Screen I/F
ADC
OSC
Regulator
Clock Generator
CPU Core
Work Memory
Program Memory
EEPROM I/F
Host I/F
4-wire or 8-wire resistive touch screen interface
10-bit A/D converter
Internal 20MHz oscillator block with optional external clock input
Internal regulator provides 1.8V DVDD supply. DVDD can also be supplied from an
external source if DVDD_EXT pin is tied high.
System clock and timing generation (10MHz CPU clock)
For dual touch processing, programmability and HOST interface
Data memory for CPU
Program memory for CPU. Code can be downloaded by HOST processor or from an
external EEPROM
To connect to external EEPROM when downloading program memory from EEPROM.
Use of external EEPROM is optional.
4-wire SPI or 2-wire I²C interface provides access to registers
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31.Mar.2014 Rev.003