hd66421 Renesas Electronics Corporation., hd66421 Datasheet - Page 39

• Manufacturer Part Number: hd66421
• Description: Ram-provided 160 Channel 4-level Grey Scale Driver For Dot Matrix Graphics Lcd
• Manufacturer: Renesas Electronics Corporation.

Blink Registers (R8 to R10): The blink bit
registers (figure 41) designate the 8-bit groups to
be blinked. Setting a bit to 1 blinks the correspond-
ing 8-bit group. Any number of groups can be
blinked; setting all the bits to 1 will blink the entire
LCD panel. These bits are valid only when the
BLK bit of control register 2 is 1. R10's data bits 7
to 4 are unused; they should be set to 0 when
written to.
Partial Display Block Register (R11): The Partial
display block register (figure 42) designates the
block of partial display. It use from bit 3 to bit 0.
Preliminary
R8
R9
R10
R12
R13
R14
R15
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Data bit
Data bit
Set value
Data bit
H'00
H'01
H'02
H'03
H'04
H'05
Figure 43 Grayscale Palette Registers (R12 to R15)
Figure 42 Partial Display Start Raster Register (R11)
Figure 41 Blink Registers (R8, R9, R10)
Row no.
COM1 to COM8
COM9 to COM16
COM17 to COM24
COM25 to COM32
COM33 to COM40
COM41 to COM48
BK0
BK8
7
7
7
BK1
BK9
6
6
6
BK10 BK11 BK12 BK13 BK14 BK15
BK2
5
5
5
Set value
H'0A
H'0B
H'06
H'07
H'08
H'09
GP14 GP13 GP12 GP11 GP10
GP24 GP23 GP22 GP21 GP20
GP34 GP33 GP32 GP31 GP30
GP44 GP43 GP42 GP41 GP40
BK3
CLE
39
4
4
4
Bit 4 is clock-enable bit. This bit sets to 1, the
signal CO,CL1,FLM and M stop in master mode.
They are high-Z. Data bits 7 and 5 are unused;
they should be set to 0 when written to.
Gray Scale Palette Registers (R12 to R15): The
gray scale palette registers (figure 43) designate
the grayscale level or colour. Use these registers
to enable an optimal grayscale or colour display.
If GRAY bit is 1, these registers are inactive. Data
bits 7 to 5 are unused; they should be set to 0
when written to.
BK16 BK17 BK18 BK19
PB3
Row no.
COM100 to COM93
COM92 to COM85
COM84 to COM77
COM76 to COM69
COM68 to COM61
COM60 to COM53
BK4
3
3
3
PB2
BK5
2
2
2
PB1
BK6
1
1
1
PB0
BK7
0
(ADC= "0". If "1" ,
reverse direction)
0
0
Rev. 1.1E '99.02.10
HD66421