参数资料
型号: M38227MCA-XXXHP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80
封装: 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 25/59页
文件大小: 900K
代理商: M38227MCA-XXXHP
Rev.1.20
Dec 24, 2003
page 31 of 57
3822 Group (A ver.)
LCD DRIVE CONTROL CIRCUIT
The 3822 group has the built-in Liquid Crystal Display (LCD) drive
control circuit consisting of the following.
qLCD display RAM
qSegment output enable register
qLCD mode register
qSelector
qTiming controller
qCommon driver
qSegment driver
qBias control circuit
A maximum of 32 segment output pins and 4 common output pins
can be used.
Up to 128 pixels can be controlled for LCD display. When the LCD
Fig. 29 Structure of segment output enable register and LCD mode register
enable bit is set to “1” after data is set in the LCD mode register,
the segment output enable register and the LCD display RAM, the
LCD drive control circuit starts reading the display data automati-
cally, performs the bias control and the duty ratio control, and
displays the data on the LCD panel.
Table 8 Maximum number of display pixels at each duty ratio
Duty ratio
Maximum number of display pixel
64 dots
or 8 segment LCD 8 digits
96 dots
or 8 segment LCD 12 digits
128 dots
or 8 segment LCD 16 digits
2
3
4
LCD mode register
(LM : address 003916)
Segment output enable register
(SEG : address 003816)
Duty ratio selection bits
0 0 : Not used
0 1 : 2 (use COM0, COM1)
1 0 : 3 (use COM0–COM2)
1 1 : 4 (use COM0–COM3)
Bias control bit
0 : 1/3 bias
1 : 1/2 bias
LCD enable bit
0 : LCD OFF
1 : LCD ON
Not used (returns “0” when read)
(Do not write “1” to this bit)
LCD circuit divider division ratio selection bits
0 0 : Clock input
0 1 : 2 division of clock input
1 0 : 4 division of clock input
1 1 : 8 division of clock input
LCDCK count source selection bit (Note)
0 : f(XCIN)/32
1 : f(XIN)/8192 (or f(XCIN)/8192 in low-speed
mode)
Note: LCDCK is a clock for a LCD timing controller.
Segment output enable bit 0
0 : Input port P34–P37
1 : Segment output SEG12–SEG15
Segment output enable bit 1
0 : I/O port P00,P01
1 : Segment output SEG16, SEG17
Segment output enable bit 2
0 : I/O port P02–P07
1 : Segment output SEG18–SEG23
Segment output enable bit 3
0 : I/O port P10,P11
1 : Segment output SEG24, SEG25
Segment output enable bit 4
0 : I/O port P12
1 : Segment output SEG26
Segment output enable bit 5
0 : I/O port P13–P17
1 : Segment output SEG27–SEG31
Not used (returns “0” when read)
(Do not write
“1” to this bit.)
b7
b0
b7
b0
相关PDF资料
PDF描述
M38224M6A-XXXFP 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80
M38227MCA-XXXFP 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80
M38227M8A-XXXHP 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP80
M38254M8DXXXFP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100
M38268M8A-XXXFP 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP100
相关代理商/技术参数
参数描述
M38227RFS 制造商:Renesas Electronics Corporation 功能描述:MCU - Trays
M3823 BK001 制造商:Alpha Wire Company 功能描述:CBL 30COND 18AWG BLK 1000'
M3823 BK002 制造商:Alpha Wire Company 功能描述:CBL 30COND 18AWG BLK 500'
M3823 BK005 制造商:Alpha Wire Company 功能描述:CBL 30COND 18AWG BLK 100'
M38234G4FP#U0 功能描述:MCU 2/5V 16K 80-QFP QZ-ROM 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)