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参数资料
型号： M38D59GC-XXXFP
元件分类： 微控制器/微处理器
英文描述： 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PQFP80
封装： 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件页数： 36/142页
文件大小： 2004K
代理商： M38D59GC-XXXFP
Rev.3.04
May 20, 2008
Page 130 of 134
REJ03B0158-0304
38D5 Group
Notes on LCD Drive Control Circuit
1. Multiplier Circuit
When the multiplier circuit is used, set the multiplier circuit
control bit to “1” (multiplier circuit enabled) after applying a
voltage from 1.3 V or more to 2.1 V or less to the VL1 pin.
When the multiplier circuit is not used, set the VL3 connection bit
to “1” (open) and apply an appropriate voltage to the LCD power
source input pins (VL1 to VL3). When the VL3 connection bit is
set open, the VL3 pin is placed in the high impedance state.
When the multiplier circuit is used, set the LCDCK frequency to
100 Hz or more. The on-chip oscillator cannot be used as
LCDCK.
In a system where the multiplier circuit is used (a multiplier
capacitor is externally connected between the C1 and C2 pins),
set the multiplier circuit control bit to “1” (multiplier circuit
enabled) before executing the STP or WIT instruction.
2. Setting Data to LCD Display RAM
To write data to the LCD display RAM when the LCD enable bit
is set to “1” and while LCD is turned on, set fixed data.
Rewriting with temporary data may cause LCD to flicker. The
following shows a processing example to write data to the LCD
display RAM while LCD is turned on.
Fig. 105 Processing example when writing data to LCD display RAM While LCD Turned On
(1) Correct processing
LCD
on
LCD
on or
off
*Content at address 084016: “FF16”
Off
On
Set LCD display RAM data
LRAM0 (address 084016)
← “FF16”
LCD on or off?
Set LCD display RAM data
LRAM0 (address 084016)
←“0016”
Set fixed data to LCD display RAM
(2) Incorrect processing
LCD
on
LCD
on or
off
*Content at address 084016: “FF16”
Off
On
Set LCD display RAM data
LRAM0 (address 084016)
← “FF16”
LCD on or off?
Set LCD display RAM data
LRAM0 (address 084016)
← “0016”
Set off data to LCD display RAM
LCD
off
Set fixed data to LCD display RAM
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相关代理商/技术参数
参数描述
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M38D59GFHP#U0 功能描述:IC 740/38D5 MCU QZ-ROM 80LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR)
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