參數(shù)資料
型號: M34551E8-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 18/154頁
文件大小: 1778K
代理商: M34551E8-XXXFP
APPLICATION
2.5 LCD function
2-37
4551 Group User’s Manual
Fig. 2.5.6 Initial setting example
b1 b0
01
b3
b0
0
“216
1
16
1
(2+1)
2
1
4
1
85.3 Hz = (32.768 kHz)
!
!!!
b3
b0
1
!
b3
b0
!
1
!
Initialization of LCD Display RAM
LCD display RAM is initialized.
Initial data is set.
LCD display RAM
b1 b0
! 0
Initialization
(Refer to section “2.3 Timer.”)
Operate Timer 2
Timer 2 count source is set to f(XCIN).
Set SEG16–SEG19
P20/SEG16–P23/SEG19 are set to output.
LCD control register L2
SEG16–SEG19 selected (TL2A instruction)
Stop Timer LC
Timer LC operation is stopped.
Timer control register W3
Timer LC stopped (TW3A instruction)
Set Timer LC
Timer LC value is set. (The formula is shown VA below.)
Timer LC reload register RLC
Timer LC TLC
Timer count value 2 is set. (TLCA instruction)
Set LCD Display Method
LCD duty and bias are set.
LCD control register L1
1/4 duty and 1/3 bias set. (TL1A instruction)
Set Timer LC Count Source
Timer LC count source is changed.
Timer control register W3
Count source is set to bit 3 of timer 2 .
Timer LC start (TW3A instruction)
Display LCD
LCD display function is set to be valid.
LCD control register LC
LCD turned ON (TL1A instruction)
to normal program
V A The timer LC count value when the frame frequency is set to 85.3 Hz is set as follows:
“!” : it can be “0” or “1.”
Display changed by rewriting LCD display RAM
Sub-clock
Bit 3 of
timer 2
Timer
LC
Duty
ratio
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