BU21024FV-M_14 Datasheet, PDF (11/20 Pages) Rohm – Resistive Type Touch Screen Controller ICs

BU210243FGVU-LM BU21023MUV BU21024FV-M
Datasheet
BU21024FV-M has monitor terminals(XPM, YPM, XNM, YNM) another interface terminals(XP, YP, XN, YN). The monitor
terminals are used in touch screen voltage monitor that 4PORT(0x30[2]) set to “0”.
The monitor terminals open and 4PORT(0x30[2]) set to “1” If they are not being used.
The monitor terminals also helps in increasing the screen’s dynamic range by reducing error due to PCB wiring resistance.
panel
option(*1)
VDD VDD
VDD
10kohm 10kohm
EEPROM
TVS diode
option(*2)
1 EDA
option(*4)
10 ohm
470pF
10 ohm
470pF
10 ohm
470pF
10 ohm
470pF
option(*3)
2 ECL
10 ohm
3 YNM
1nF
10 ohm
4 XNM
1nF
10 ohm
5 YPM
1nF
10 ohm
6 XPM
1nF
7 YN
8 XN
9 YP
10 XP
0.1uF
11 T4
12 PVDD
1.0uF
1.0uF
13 AVDD
14 DVDD
SCL_SCK 28
SDA_SI 27
SEL_CSB 26
INT 25
SO 24
IFSEL 23
T3 22
BU21024FV-M
T2 21
T1 20
CLK_EXT 19
RSTB 18
VSS 17
VDD 16
DVDD_EXT 15
10kohm
(10kohm)
1.0uF
Host
VDD
(*1) EEPROM interface PIN.In using case: 10kohm pull-up. no-use case: connect to GND.
(*2) For higher ESD protection.
(*3) For LCD-noise protection.
(*4) For RF-noise protection.
Example 5: BU21024FV-M Application Circuit (4-wireSPI, using monitor terminals)
panel
option(*1)
VDD VDD
IO VDD
10kohm 10kohm
EEPROM
TVS diode
option(*2)
1 EDA
option(*4)
10 ohm
470pF
10 ohm
470pF
10 ohm
470pF
10 ohm
470pF
option(*3)
2 ECL
10 ohm
3 YNM
1nF
10 ohm
4 XNM
1nF
10 ohm
5 YPM
1nF
10 ohm
6 XPM
1nF
7 YN
8 XN
9 YP
10 XP
0.1uF
11 T4
12 PVDD
1.0uF
1.0uF
13 AVDD
14 DVDD
SCL_SCK 28
10kohm
SDA_SI 27
option(*5)
SEL_CSB 26
Host
INT 25
SO 24
IFSEL 23
VDD
T3 22
BU21024FV-M
T2 21
T1 20
CLK_EXT 19
RSTB 18
VSS 17
1.0uF
VDD 16
VDD
DVDD_EXT 15
(*1) EEPROM interface PIN.In using case: 10kohm pull-up. no-use case: connect to GND.
(*2) For higher ESD protection.
(*3) For LCD-noise protection.
(*4) For RF-noise protection.
(*5) Please connect to VDD when use as slave address = “BAh(7bit:5Dh+W/R bit)”.
Example 6: BU21024FV-M Application Circuit (2-wire Serial bus, using monitor terminals)
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TSZ22111・15・001
11/16
TSZ02201-0L5L0F300190-1-2
31.Mar.2014 Rev.003