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BU21024FV-ME2 Folha de dados(PDF) 11 Page - Rohm

Nome de Peças BU21024FV-ME2
Descrição Electrónicos  Resistive Type Touch Screen Controller ICs
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
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BU21024FV-ME2 Folha de dados(HTML) 11 Page - Rohm

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Technical Note
11/17
www.rohm.com
2011.08 - Rev.A
© 2011 ROHM Co., Ltd. All rights reserved.
BU21023GUL,BU21023MUV,BU21024FV-M
BU21024FV-M】
No.
Pin name
I/O
Function
fig
1
EDA
I/O
EEPROM SDA
C
2
ECL
O
EEPROM SCL
C
3
YNM
I/O
Panel interface (Test input)
E
4
XNM
I/O
Panel interface (Test input)
E
5
YPM
I/O
Panel interface (Test input)
E
6
XPM
I/O
Panel interface (Test input)
E
7
YN
I/O
Panel interface
E
8
XN
I/O
Panel interface
E
9
YP
I/O
Panel interface
E
10
XP
I/O
Panel interface
E
11
T4
I/O
Test pin
E
12
PVDD
O
Regulator output (for supply panel voltage)
-
13
AVDD
O
Regulator output (for supply analog block)
-
14
DVDD
I/O
Regulator output (for supply digital block) or supply digital voltage
(DVDD_EXT="H")
-
15
DVDD_EXT
I
Digital voltage enable (H=Hi-Z , L=DVDD enable)
E
16
VDD
-
Supply voltage
-
17
VSS
-
Ground
-
18
RSTB
I
H/W reset
E
19
CLK_EXT
I
Supply external clock for debug
A
20
T1
I
Test pin
A
21
T2
I
Test pin
A
22
T3
I
Test pin
A
23
IFSEL
I
Intereface select pin (L=SPI, H=2wire serial)
A
24
SO
O
SPI
Serila data output
2wire
-
F
25
INT
O
Interrupt output
C
26
SEL_CSB
I
SPI
Chip select
2wire
Slave address select
C
27
SDA_SI
I/O
SPI
Serial data input
2wire
Serial data in-out
C
28
SCL_SCK
I
SPI
Serial clock input
2wire
Serial clock input
C
1.
Please use 1.0uF capacitors between AVDD and DVDD to GND, and leave PVDD terminal open.
2.
If DVDD_EXT=”H “, the DVDD pin can be connected to an external 1.8V power source.
3.
Please pull up the ECL, EDA, and INT pins using 10k ohm resistors as shown in the application diagram at the end of this document.
ECL and EDA pins may be directly connected to GND if an external EEPROM is not being used. Please connect a 0.1uF capacitor between
T4 and GND. T1, T2 & T3 pins should be connected to GND.
4.
When using the 2 wire serial interface, please pull up the SCL_SCK, SDA_SI pins via 10k ohms and leave SO unconnected.
5.
Please note that the values of resistors and capacitors mentioned here are only recommended values.
6.
RSTB should be held low until supply voltage VDD has ramped up and has reached a stable level.
7.
The polarity of INT pin is programmable via register 0x30
8.
Connect CLK_EXT to GND for normal use
9.
Please leave the XPM, XNM, YPM, YNM terminals open if using a 4-wire touch screen. These pins should be connected to the reference leads of an
8-wire touch screen if one is being used.
TOP VIEW


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