HT49C30-1 Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT49C30-1 Datasheet PDF : 43 Pages
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HT49R30A-1/HT49C30-1/HT49C30L
LCD driver output
The output number of the device LCD driver can be 19´2
or 19´3 or 18´4 by options (i.e., 1/2 duty, 1/3 duty or 1/4
duty). The bias type of LCD driver can be ²R² type (for
HT49R30A-1/HT49C30-1) or ²C² type. If the ²R² bias type
is selected, no external capacitor is required. If the ²C²
bias type is selected, a capacitor mounted between C1
and C2 pins is needed. The bias voltage of LCD driver
can be 1/2 bias or 1/3 bias by options.
D u r in g a r e s e t p u ls e
VA
C O M 0 ,C O M 1 ,C O M 2
VB
VSS
VA
A ll L C D d r iv e r o u tp u ts
VB
VSS
N o r m a l o p e r a tio n m o d e
COM 0
*
*
*
VA
VB
VSS
VA
COM 1
VB
VSS
VA
C O M 2*
VB
VSS
L C D s e g m e n ts O N
VA
VB
C O M 0 ,1 ,2 s id e s a r e u n lig h te d
VSS
O n ly L C D s e g m e n ts O N
C O M 0 s id e a r e lig h te d
VA
VB
VSS
O n ly L C D s e g m e n ts O N
VA
C O M 1 s id e a r e lig h te d
VB
VSS
O n ly L C D s e g m e n ts O N
VA
C O M 2 s id e a r e lig h te d
VB
VSS
L C D s e g m e n ts O N
C O M 0 ,1 s id e s a r e lig h te d
VA
VB
VSS
L C D s e g m e n ts O N
C O M 0 ,2 s id e s a r e lig h te d
VA
VB
VSS
L C D s e g m e n ts O N
C O M 1 ,2 s id e s a r e lig h te d
VA
VB
VSS
L C D s e g m e n ts O N
VA
C O M 0 ,1 ,2 s id e s a r e lig h te d
VB
VSS
H A LT M ode
VA
C O M 0 ,C O M 1 ,C O M 2 *
VB
VSS
VA
A ll L C D d r iv e r o u tp u ts
VB
VSS
N o te :
" * " O m it th e C O M 2 s ig n a l, if th e 1 /2 d u ty L C D is u s e d .
V A = V L C D , V B = 1 /2 V L C D fo r H T 4 9 R 3 0 A -1 /H T 4 9 C 3 0 -1
V A = 2 V 2 , V B = V 2 , C ty p e fo r H T 4 9 C 3 0 L
LCD driver output (1/3 duty, 1/2 bias, R/C type)
Rev. 1.10
20
September 25, 2002
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