BU21029GUL Datasheet, PDF (10/29 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21029GUL
Datasheet
●Power Supply and Reset Timing Specification
When pin RSTB is low, BU21029GUL is in standby mode and the host cannot communicate with it. Once pin RSTB is set high,
BU21029GUL will go to idle state after the time define by Tdelay has passed and will be able to communicate with the host
processor again.
Pin RSTB can be connected to the power supply through the power-on-reset circuit.
VDD
PVDD
0V
RSTB
0V
Typ. 3.0V
Trise
Tdelay
Typ. 3.0V
VDD*0.2
Enable
(Internal signal)
‘L’(Disable)
Twait
‘H’(Enable)
‘L’(Disable)
Toff
Power-on-reset AC Timing Characteristics (Ta=25℃, VDD=PVDD=3.00V, GND=0.00V, unless otherwise noted)
Parameter
Symbol
MIN
Rating
TYP
Unit
MAX
Condition
VDD rise time
Trise
0.01
-
10
ms
RSTB delay time
Tdelay
0
-
-
ms
Enable delay time
Twait
-
-
1
ms
VREF, DVDD_IN, DVDD_OUT,
Cload=1.0uF
RSTB time
Toff
1
-
30
us
VREF, DVDD_IN, DVDD_OUT,
Cload=1.0uF
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TSZ22111・15・001
10/26
TSZ02201-0Y1Y0F300120-1-2
11.Nov.2013 Rev.002