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HT49R50 Folha de dados(PDF) 26 Page - Holtek Semiconductor Inc

Nome de Peças HT49R50
Descrição Electrónicos  8-Bit Microcontroller
PDF  59 Pages
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Fabricante Electrônico  HOLTEK [Holtek Semiconductor Inc]
Página de início  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT49R50 Folha de dados(HTML) 26 Page - Holtek Semiconductor Inc

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HT49R50
26
October 22, 1999
40H
CO M
0
1
2
3
SE G M EN T
41H
42H
43H
5E H
5 F H
60H
B i t
0
1
2
3
0
1
2
3
30
31
32
Display memory
LCD display memory
The HT49R50 provides an area of embedded
data memory for LCD display. This area is lo-
cated from 40H to 60H of the RAM at Bank 1.
Bank pointer (BP; located at 04H of the RAM) is
the switch between the RAM and the LCD dis-
play memory. When the BP is set as "1", any
data written into 40H~60H will effect the LCD
display. When the BP is cleared to "0", any data
written into 40H~60H means to access the gen-
eral purpose data memory. The LCD display
memory can be read and written to only by indi-
rect 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 sig-
nals. To turn the display on or off, a "1" or a "0"
is written to the corresponding bit of the display
memory, respectively. The figure illustrates the
mapping between the display memory and LCD
pattern for the HT49R50.



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