參數(shù)資料
型號： UPD161401P
廠商： NEC Corp.
英文描述： CABLE ASSEMBLY; N MALE TO TNC MALE; 50 OHM, RG214/U COAX, DOUBLE SHIELDED; 12" CABLE LENGTH
中文描述： 256色，1/80-DUTY LCD控制器/驅(qū)動器，片內(nèi)RAM
文件頁數(shù)： 41/124頁
文件大?。?/td> 647K
代理商： UPD161401P
Data Sheet S15726EJ2V0DS
41
μ
PD161401
(b) When external resistor is used (when internal resistor for adjusting V
LCD
is not used)
LCD drive voltage V
LCD
can be controlled not only by a setting of the internal resistor for adjusting V
LCD
(IRS = L)
but also by connecting resistors Rae, Rbe, and Rce between V
SS
and V
R
, between V
R
and AMP
OUTM
, and between
V
R
and AMP
OUTS
, respectively. In this case also, LCD drive voltage V
LCD
and the contrast of the LCD can be
adjusted by using the electronic control function and commands.
In addition, the
μ
PD161401 can select two values of V
LCD
for normal display and partial display. These values are
set by using an external divider resistor and automatically selected by the DTY flag of control register 2 (R1).
Where V
LCD
< V
OUT
, the value of V
LCD
can be calculated by the expression in Example 1 (DTY = 0) and the
expression in Example 2 (DTY = 1).
Example 1.
To calculate value of V
LCD
(DTY = 0, in main duty display mode)
V
LCD
= (1 + Rbe
EV
V
LCD
= (1 + Rbe
) V
REG
Rae
Remark
V
EV
= (1
) V
REG
Example 2.
To calculate value of V
LCD
(DTY = 1, in sub-duty display mode)
V
LCD
= (1 + Rce
EV
V
LCD
= (1 + Rce
256
REG
Rae
Remark
V
EV
= (1
256
REG
Figure 5
17. Example of Circuit Using External Resistor
(DTY = 0)
V
LCD
+
Rbe
Rae
AMP
OUTS
V
R
V
RS
Rce
AMP
OUTM
(DTY = 1)
A
B
A
B
A
B
Main/sub-duty V
LCD
adjustment selector
Main duty display mode
Sub-duty display mode
Rae
Rae
256
256
α
α
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相關代理商/技術(shù)參數(shù)
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UPD161401W 制造商:NEC 制造商全稱:NEC 功能描述:256-COLOR, 1/80-DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM
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