參數(shù)資料
型號： SED1335F
廠商： Electronic Theatre Controls, Inc.
英文描述： LCD Controller ICs
中文描述： LCD控制器芯片
文件頁數(shù)： 121/148頁
文件大?。?/td> 388K
代理商： SED1335F
S-MOS Systems, Inc. 2460 North First Street San Jose, CA 95131 Tel: (408) 922-0200 Fax: (408) 922-0238
268-0.4
121
9.0 – 9.1.1
9.0 Application Notes
9.0 Application Notes
9.1 Initialization Parameters
The parameters for the initialization commands must
be determined first. Square brackets around a param-
eter name indicate the number represented by the
parameter, rather than the value written to the param-
eter register. For example, [FX] = FX + 1.
9.1.1
SYSTEM SET Instruction and Param-
eters
FX
The horizontal character field size is deter-
mined from the horizontal display size in pixels
[VD] and the number of characters per line
[VC].
[VD] / [VC]
≤
[FX]
VD: # of X-directional dots
VC: # of X-directional characters
C/R
C/R can be determined from VC and FX.
[C/R] = RND([FX] / 8)
×
[VC]
where RND(x) denotes x rounded up to the
next highest integer. [C/R] is the number of
bytes per line, not the number of characters.
TC/R
TC/R must satisfy the condition [TC/R]
≥
[C/R]
+ 4.
f
OSC
and f
FR
Once TC/R has been set, the frame frequency,
f
FR
, and lines per frame [L/F] will also have
been set. The lower limit on the oscillator
frequency f
OSC
is given by:
f
OSC
≥
([TC/R]
×
9 + 1)
×
[L/F]
×
f
FR
If no standard crystal close to the calculated
value of f
OSC
exists, a higher frequency crystal
can be used and the value of TC/R revised
using the above equation.
Symptoms of an incorrect TC/R setting are
listed below. If any of these appears, check the
value of TC/R and modify it if necessary.
Vertical scanning halts and a high-con-
trast horizontal line appears.
All pixels are on or off.
The LP output signal is absent or cor-
rupted.
The display is unstable.
Table 31. Epson LCD unit example parameters (SED1335F only)
Resolution (X
×
Y)
[FX]
[FY]
[C/R]
TC/R
f
OSC
(MHz)
See Note 2
[FX] = 6 pixels:
256 / 6 = 42 remainder 4
= 4 blank pixels
[FX] = 6 pixels:
512 / 6 = 85 remainder 2
= 2 blank pixels
[FX] = 8 pixels:
256 / 8 = 32 remainder 0
= no blank pixels
[FX] = 10 pixels:
512 / 10 = 51 remainder
2 = 2 blank pixels
8 or 16, depending
on the screen
[C/R] = 42 = 2AH bytes:
C/R = 29H. When using HDOT
SCR, [C/R] = 43 bytes
[C/R] = 85 = 55H bytes:
C/R = 54H. When using HDOT
SCR, [C/R] = 86 bytes
[C/R] = 32 = 20H bytes:
C/R = 19H. When using HDOT
SCR, [C/R] = 33 bytes
[C/R] = 102 = 66H bytes:
C/R = 65H. When using HDOT
SCR, [C/R] = 103 bytes
256
×
64
2DH
1.85
8 or 16, depending
on the screen
512
×
64
58H
3.59
8 or 16, depending
on the screen
256
×
128
22H
2.90
8 or 16, depending
on the screen
512
×
128
69H
8.55
Notes:
1. The remainder pixels on the right-hand side of the display are automatically blanked by the SED1335F. There is no need to
zero the display memory corresponding to these pixels.
2. Assuming a frame frequency of 60 Hz.
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