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| BU21049GUL Datasheet, PDF (10/26 Pages) Rohm – 4-wire Resistive Touch Screen Controller | |||
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BU21049GUL
Datasheet
âPower supply and reset timing specification
The BU21049GUL will be in standby state, if the RSTB pin is low, and the host processor cannot communicate with the
BU21049GUL. If pass the time(defined by Tdelay) after the RSTB pin is set to high, the BU21049GUL will be in idle state
and comes to be able to perform communication with the host processor.
The RSTB pin is connectable with power supply by the power-on-reset circuit.
VDD
PVDD
0V
RSTB
0V
Typ. 3.0V
Trise
Tdelay
Typ. 3.0V
VDD*0.2
Enable
(Internal signal)
âLâ(Disable)
Twait
âHâ(Enable)
âLâ(Disable)
Toff
Power-on-reset AC timing characteristics (Ta=25â, 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 Cload=1.0uF
RSTB time
Toff
1
-
30
us
VREF Cload=1.0uF
www.rohm.co
© 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111ã»15ã»001
10/23
TSZ02201-0Y1Y0F300010-1-2
31.JAN.2012 Rev.001
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