HT49C10-1 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT49C10-1' PDF : 38 Pages View PDF
HT49R10A-1/HT49C10-1
LCD Display Memory
The device provides an area of embedded data memory
for LCD display. This area is located from 40H to 4EH of
the RAM at Bank 1. Bank pointer (BP; located at 04H of
the RAM) is the switch between the RAM and the LCD
display memory. When the BP is set as ²01H², any data
written into 40H~4EH will effect the LCD display. When
the BP is cleared to ²00H², any data written into
40H~4EH means to access the general purpose data
memory. The LCD display memory can be read and writ-
ten to only by indirect addressing mode using MP1.
When data is written into the display data area, it is auto-
matically read by the LCD driver which then generates
the corresponding LCD driving signals. To turn the dis-
play on or off, a ²1² or a ²0² is written to the correspond-
ing bit of the display memory, respectively. The figure
illustrates the mapping between the display memory
and LCD pattern for the device.
D u r in g a r e s e t p u ls e
C O M 0 ,C O M 1 ,C O M 2
A ll L C D d r iv e r o u tp u ts
N o r m a l o p e r a tio n m o d e
*
COM 0
COM 1
C O M 2*
L C D s e g m e n ts O N
C O M 0 ,1 ,2 s id e s a r e u n lig h te d
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
O n ly L C D s e g m e n ts O N
C O M 1 s id e a r e lig h te d
O n ly L C D s e g m e n ts O N
C O M 2 s id e a r e lig h te d
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
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
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
L C D s e g m e n ts O N
C O M 0 ,1 ,2 s id e s a r e lig h te d
COM
40H 41H 42H 43H
4 C H 4 D H 4 E H B it
0
0
1
1
2
2
3
3
SEG M ENT
0123
12 13 14
Display Memory
LCD Driver Output
The output number of the LCD driver device can be
15´2, 15´3 or 14´4 by configuration option (i.e., 1/2
duty, 1/3 duty or 1/4 duty). The bias type LCD driver can
be ²R² type or ²C² type by configuration option. If the ²R²
bias type is selected, no external capacitor is required. If
the ²C² bias type is selected, a capacitor mounted be-
tween C1 and C2 pins is needed. There are two types of
LCD bias power can be selected by configuration op-
VA
VB
VSS
VA
VB
VSS
*
*
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
VB
VSS
VA
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
LCD Driver Output (1/3 Duty, 1/2 Bias, R/C Type)
Rev. 1.50
19
July 30, 2012
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