m66271fp Renesas Electronics Corporation., m66271fp Datasheet - Page 17

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

M66271FP
Address
00010
Note:
00100
REJ03F0267-0200 Rev.2.00 Mar 18, 2008
Page 17 of 27
Address
(2-2) Horizontal display characters number register [R2]
(2-3) Horizontal synchronous pulse width register [R3]
Definition of the number of display characters.
The number of display characters means data which is corresponding with 1 byte of VRAM.
In case of binary, 1 bit of VRAM corresponds to 1 dot of display, then 1 character means 8 dots of display.
R/W
W
W
R/W
•
•
•
•
D7
D7
0
0
0
1
The number of horizontal display characters per line can set to the extent of Max = 504 dots (= 63
characters)
When reset, CR = "28
Set the length of horizontal synchronous pulse width which appeared per line in character unit.
Horizontal synchronous pulse output from LP output pin, and use for changing serial/parallel of
displaying data.
Adjusting this pulse width is possible to set frame frequency the fittest value.
And the actual LP output pulse is (LPW setting value – 1CP) in consideration of timing with CP output.
When reset, LPW = "01
D6
D6
0
0
0
1
D5
0
0
0
1
D5
0
0
0
1
D4
0
0
0
1
D4
LPW
0
0
0
1
H
↓
" (= 40 characters = 320 dots)
CR
H
D3
" (= 1 character)
0
0
0
1
D3
0
0
0
1
D2
↓
0
0
0
1
D2
0
0
0
1
D1
0
0
1
1
D1
0
0
1
1
D0
Function
Function
0
1
0
1
D0
0
1
0
1
Character Number
Character Number
255
—
1
2
↓
63
—
↓
1
2
Display Dot Number
504
16
—
8
↓
Reset
28
Reset
01
H
H