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PDF HD66420 Data sheet ( Hoja de datos )
| Número de pieza | HD66420 | |
| Descripción | (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD) | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD66420
(RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot
Matrix Graphics LCD)
Description
The HD66420 drives and controls a dot matrix graphic LCD(Liquid Crystal Display) using a bit-mapped
method. It provides a highly flexible display through its on-chip display RAM, in which each two bits of
data can be used to turn on or off one dot on LCD panel with four-level grey scale.
A single HD66420 can display a maximum of 160x80 dots using its powerful display control functions. It
can display only eight lines out of eighty lines. This function realize low power consumption because high
voltage for driving LCD is not needed.
An MPU can access HD66420 at any time, because the MPU operations are asynchronous with the
HD66420’s system clock and display operation.
Its low-voltage operation at 2.2 to 5.5V and standby function provides low power dissipation, making the
HD66420 suitable for small portable device applications.
Features
• Built-in bit-mapped display RAM: 25.6kbits (160 × 80 × 2 bits)
• Grey scale display: PWM four-level grey scale can be selected from 32 levels
• Grey scale memory management: Packed pixel
• Partial display: Eight-lines data can be displayed in any place
• An 80-system MPU interface
• Power supply voltage for operation : 2.2V to 5.5V
• Power supply voltage for LCD : 13 V max.
• Selectable multiplex duty ratio: 1/8, 1/32, 1/64, 1/80
• Built-in oscillator: external resister
• Low power consumption:
55µA typ. 80µA max. during display
0.1µA typ. 5µA max. during standby
• Circuits for generating LCD driving voltage : Contrast control, Operational amplifier, and Resistive
dividers
• Internal resistive divider: programmable bias rate
• 32-level programmable contrast control
1
1 page  
HD66420
Resister List
Index
Reg.Bits
CS RS 4 3 2 1 0
Register Name
1 – – –– ––
0 0 – – – – – IR Index register
0 1 0 0 0 0 0 R0 Control register 1
0 1 0 0 0 0 1 R1 Control register 2
0 1 0 0 0 1 0 R2 X address register
0 1 0 0 0 1 1 R3 Y address register
0 1 0 0 1 0 0 R4 Display RAM access register
0 1 0 0 1 0 1 R5 Display start line register
0 1 0 0 1 1 0 R6 Blink start line register
0 1 0 0 1 1 1 R7 Blink end line register
0 1 0 1 0 0 0 R8 Blink register 1
0 1 0 1 0 0 1 R9 Blink register 2
0 1 0 1 0 1 0 R10 Blink register 3
0 1 0 1 0 1 1 R11 Partial display block register
0 1 0 1 1 0 0 R12 Gray scale palette 1 (0, 0)
0 1 0 1 1 0 1 R13 Gray scale palette 2 (0, 1)
0 1 0 1 1 1 0 R14 Gray scale palette 3 (1, 0)
0 1 0 1 1 1 1 R15 Gray scale palette 4 (1, 1)
0 1 1 0 0 0 0 R16 Contrast control register
0 1 1 0 0 0 1 R17 Reserved
0 1 1 0 0 1 0 R18 Reserved
0 1 1 0 0 1 1 R19 Reserved
0 1 1 0 1 0 0 R20 Reserved
0 1 1 0 1 0 1 R21 Reserved
0 1 1 0 1 1 0 R22 Reserved
0 1 1 0 1 1 1 R23 Reserved
0 1 1 1 0 0 0 R24 Reserved
0 1 1 1 0 0 1 R25 Reserved
0 1 1 1 0 1 0 R26 Reserved
0 1 1 1 0 1 1 R27 Reserved
0 1 1 1 1 0 0 R28 Reserved
0 1 1 1 1 0 1 R29 Reserved
0 1 1 1 1 1 0 R30 Reserved
0 1 1 1 1 1 1 R31 Reserved
Data bits
R/W 7 6 5 4 3 2 1 0
–
W IR4 IR3 IR2 IR1 IR0
W RMW DISP STBY PWR AMP REV HOLT ADC
W BIS1 BIS0 WLS GRAY DTY1 DTY0 INC BLK
W XA5 XA4 XA3 XA2 XA1 XA0
W YA6 YA5 YA4 YA3 YA2 YA1 YA0
R/W D7 D6 D5 D4 D3 D2 D1 D0
W ST6 ST5 ST4 ST3 ST2 ST1 ST0
W BSL6 BSL5 BSL4 BSL3 BSL2 BSL1 BSL0
W BEL6 BEL5 BEL4 BEL3 BEL2 BEL1 BEL0
W BK0 BK1 BK2 BK3 BK4 BK5 BK6 BK7
W BK8 BK9 BK10 BK11 BK12 BK13 BK14 BK15
W BK16 BK17 BK8 BK9
W PB3 PB2 PB1 PB0
W GP14 GP13 GP12 GP11 GP10
W GP24 GP23 GP22 GP21 GP20
W GP34 GP33 GP32 GP31 GP30
W GP44 GP43 GP42 GP41 GP40
W CM1 CM0 CC4 CC3 CC2 CC1 CC0
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
5
5 Page 
HD66420
CS
RS
WR
RD
DB7 to
DB0
Data
Data
Data
Data
Data
Data
Write index
register
Write data
register
Write data
register
Write index Read data Read data
register
register
register
Figure 3 8-Bit Data Transfer Sequence
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HD66420.PDF ] | |
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