BU21024FV-M Datasheet, PDF (8/18 Pages) Rohm – Resistive Type Touch Screen Controller ICs

BU21023GUL,BU21023MUV,BU21024FV-M
Technical Note
【BU21024FV-M】
XP
XN
YP
YN
XPM
XNM
YPM
YNM
CLK_EXT
Panel
I/F
ADC
(10bit)
Filter
Work
memory
EEPROM
I/F
CPU
(8bit)
Program
memory
Osc
Clock
generator
Regulator
register
Host
I/F
ECL
EDA
SEL_CSB
SCL_SCK
SDA_SI
SO
INT
IFSEL
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
10bit 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 if downloading program memory from EEPROM. Use
of external EEPROM is optional.
4-wire SPI or 2-wire I²C like interface provides access to registers
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2011.08 - Rev.A