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參數資料
| 型號： | W742C813 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4-BIT, MROM, 3.58 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數： | 42/56頁 |
| 文件大?。?/td> | 455K |
| 代理商： | W742C813 |
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W742E/C813
- 42 -
Table 6 The reation between the LCDR and segment/common pins used as LCD drive output
pins
OUTPUT
LCD
COM7
COM6
COM5
COM4
LCD
COM3
COM2
COM1
COM0
PIN
RAM
BIT3
BIT2
BIT1
BIT0
RAM
BIT3
BIT2
BIT1
BIT0
SEG0
LCDR01
0/1
0/1
0/1
0/1
LCDR00
0/1
0/1
0/1
0/1
SEG1
LCDR03
0/1
0/1
0/1
0/1
LCDR02
0/1
0/1
0/1
0/1
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
SEG38
LCDR4D
0/1
0/1
0/1
0/1
LCDR4C
0/1
0/1
0/1
0/1
SEG39
LCDR4F
0/1
0/1
0/1
0/1
LCDR4E
0/1
0/1
0/1
0/1
OUTPUT
LCD
COM15
COM14
COM13
COM12
LCD
COM11
COM10
COM9
COM8
PIN
RAM
BIT3
BIT2
BIT1
BIT0
RAM
BIT3
BIT2
BIT1
BIT0
SEG0
LCDR81
0/1
0/1
0/1
0/1
LCDR80
0/1
0/1
0/1
0/1
SEG1
LCDR83
0/1
0/1
0/1
0/1
LCDR82
0/1
0/1
0/1
0/1
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
SEG38
LCDRCD
0/1
0/1
0/1
0/1
LCDRCC
0/1
0/1
0/1
0/1
SEG39
LCDRCF
0/1
0/1
0/1
0/1
LCDRCE
0/1
0/1
0/1
0/1
The LCDON instruction turns the LCD display on (even in HOLD mode), and the LCDOFF instruction
turns the LCD display off. At the initial reset state, the LCD display is turned off automatically. To turn
on the LCD display, the instruction LCDON must be executed.
5.25.1 LCD RAM Addressing Method
There are 160 LCD RAMs (LCDR00H
LCDR4FH, LCDR80H
LCDR0CFH) that should be indirectly
addressed. The LCD RAM pointer (LP) is used to point to the address of the wanted LCD RAM
but it
is not readable
. The LP is organized as 8-bit binary register. The
MOV LPL,R
and
MOV LPH,R
instructions can load the LCD RAM address from RAM to the LP register. The
MOV @LP,R
and
MOV
R,@LP
instructions can access the pointed LCD RAM content.
5.25.2 LCD Voltage and Contrast Adjusting
LCD power (VLCD2) has two source, one is directly from the VLCD1 pin, another is from internal pump
circuit. The LCD power source is selected by mask option. The pump circuit doubles the
μ
C input
voltage (V
DD
), the power consumption in internal pump mode is more than directly input from VLCD1.
The LCD pump circuit only works in the V
DD
range from 2.4V to 4.0V. If the operating voltage of V
DD
is
up 4.0V, the LCD power should come from the VLCD1 pin. The LCD contrast is adjustable by an
internal variable resistor (VR). VLCD voltage is controlled by setting bit2, bit1 and bit0 of LCD contrast
control register (LCDCC). LCDCC is determined by executing MOV LCDCC,#I. The Figure 5-18 shows
the LDC power control as below:
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相關代理商/技術參數 |
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| W742CE811 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
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