m66271fp Renesas Electronics Corporation., m66271fp Datasheet - Page 20

• Manufacturer Part Number: m66271fp
• Description: Operation Panel Controller
• Manufacturer: Renesas Electronics Corporation.

M66271FP
Address
10010
IDXL
10100
IDXH
Description of LCD Display
Relation between Setting of Control Register and LCD Displaying
REJ03F0267-0200 Rev.2.00 Mar 18, 2008
Page 20 of 27
(2-9) VRAM address index register [R10, R11]
UD <3:0>
R/W
R/W
OSC
CP
LP
Figure 6 Relation between Setting of Control Register and LCD Displaying
(1) Time for processing a horizontal line (TH)
(2) Time for processing a frame (TFR)
•
•
•
•
•
•
1 Character number = 8 dots display
1
D7
Exclusive VRAM address index register for the LCD module built-in system.
It is possible to change the register only one side, because IDXH and IDXL are independent each
other.
It is possible to set VRAM access address to the extent of 257F
Don't set address over 2580
D6 and D7 output "0" when read IDXH
When reset, IDXL and IDXH = "0000
Character number of horizontal display
2
D6
TH =
TFR = TH × SLT
Expectant
LCD PANEL
3
D5
0
0
0
1
CR
fosc
CR
2
D4
1 horizontal line
0
0
0
0
IDXH
n − 2
D3
× (CR + LPW)
0
0
0
0
n − 1
↓
D2
0
0
0
1
n
1 horizontal line
H
.
SLT
D1
0
0
0
0
D0
H
0
0
0
1
".
Horizontal synchronous pulse width
D7
CSW
0
0
0
0
Function
Data is indefinite
D6
LPW
0
0
0
1
Condition of control register
(CR × 8) × SLT ≤ 76800 dots
D5
0
0
0
1
CR, LPW, CSW: Unit of character number
By adjusting LPW, it is possible to set a frame frequency
which is requested from LCD PANEL the fittest value.
D4
0
0
0
1
IDXL
↓
H
D3
(= 9600 address).
0
0
0
1
SLT: Unit of line number
fosc: Internal OSC clock frequency
D2
0
0
0
1
after dividing OSC1 input
1
× Vertical line number SLT
D1
0
0
1
1
2
D0
0
1
0
1
VRAM Address
Accessing
0000
0001
0002
257F
↓
H
H
H
H
0000H
Reset