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455A Datasheet(PDF) 46 Page - Renesas Technology Corp

Part # 455A
Description  SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PDF  148 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

455A Datasheet(HTML) 46 Page - Renesas Technology Corp

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Rev.1.01
Feb 15, 2008
Page 46 of 146
REJ03B0224-0101
455A Group
(4) LCD drive waveform
When “1” is written to a bit in the LCD RAM data, the voltage
difference between common pin and segment pin which
correspond to the bit automatically becomes lVLC3l and the
display pixel at the cross section turns on.
When returning from reset, and in the RAM back-up mode, a
display pixel turns off because every segment output pin and
common output pin becomes VLC3 level.
Fig 46. LCD controller/driver structure
1/2 Duty, 1/2 Bias: When writing (XX10)2 to address M (1, 14, 8) in RAM.
VLC3
VSS
VLC1=VLC2
VLC3
VSS
VLC1=VLC2
(2/F)
1 flame (3/F)
(4/F)
ON
OFF
Voltage level
VLC3
VLC2
VSS
VLC1
VLC3
VLC2
VSS
VLC1
Voltage level
VLC3
VLC2
VSS
VLC1
VLC3
VLC2
VSS
VLC1
Voltage level
COM0
COM0
COM0
COM1
COM1
COM2
COM2
COM3
COM1
COM1
COM2
COM3
COM2
COM1
COM0
COM1
COM0
COM0
COM1
SEG16
SEG16
SEG16
SEG16
SEG16
COM2
SEG16
COM3
SEG16
COM2
SEG16
COM1
SEG16
COM0
SEG16
COM1
SEG16
COM0
SEG16
COM0
SEG16
SEG16
SEG16
0
1
X
X
M (1, 14, 8)
(bit 0)
M (1, 14, 8)
(bit 0)
M (1, 14, 8)
(bit 0)
(bit 3)
(bit 3)
(bit 3)
ON
OFF
ON
1
0
1
X
ON
OFF
ON
OFF
0
1
0
1
F : LCD clock frequency
X: Set an arbitrary value.
(These bits are not related to
set the drive waveform at each duty.)
1/F
1/F
1/F
1/3 Duty, 1/3 Bias: When writing (X101)2 to address M (1, 14, 8) in RAM.
1/4 Duty, 1/3 Bias: When writing (1010)2 to address M (1, 14, 8) in RAM.
1 flame
1 flame



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