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ST72T251G1B6XXX PDF预览

ST72T251G1B6XXX

更新时间: 2024-11-02 13:14:07
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 微控制器和处理器外围集成电路光电二极管可编程只读存储器电动程控只读存储器时钟
页数 文件大小 规格书
11页 70K
描述
8-BIT, OTPROM, 8MHz, MICROCONTROLLER, PDIP32, 0.400 INCH, PLASTIC, SDIP-32

ST72T251G1B6XXX 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:DIP包装说明:0.400 INCH, PLASTIC, SDIP-32
针数:32Reach Compliance Code:not_compliant
HTS代码:8542.31.00.01风险等级:5.89
具有ADC:YES地址总线宽度:
位大小:8CPU系列:ST72
最大时钟频率:16 MHzDAC 通道:NO
DMA 通道:NO外部数据总线宽度:
JESD-30 代码:R-PDIP-T32JESD-609代码:e0
长度:27.94 mmI/O 线路数量:22
端子数量:32最高工作温度:85 °C
最低工作温度:-40 °CPWM 通道:YES
封装主体材料:PLASTIC/EPOXY封装代码:SDIP
封装等效代码:DIP32,.6封装形状:RECTANGULAR
封装形式:IN-LINE, SHRINK PITCH电源:3.3/5 V
认证状态:Not QualifiedRAM(字节):256
ROM(单词):4096ROM可编程性:OTPROM
座面最大高度:5.08 mm速度:8 MHz
子类别:Microcontrollers最大供电电压:5.5 V
最小供电电压:3.5 V标称供电电压:5 V
表面贴装:NO技术:HCMOS
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:THROUGH-HOLE端子节距:1.778 mm
端子位置:DUAL宽度:10.16 mm
uPs/uCs/外围集成电路类型:MICROCONTROLLERBase Number Matches:1

ST72T251G1B6XXX 数据手册

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APPLICATION NOTE  
ST7 KEYPAD DECODING TECHNIQUES, IMPLEMENTING  
WAKE-UP ON KEYSTROKE  
by Microcontroller Division Application Team  
INTRODUCTION  
The goal of this application note is to present an example of the use of the HALT mode.  
In this application, the MCU (here a ST72251) is waked up by an external interrupt caused by  
someone pressed a key on the 4x4 matrixed keypad.  
1 ST7 / KEYBOARD INTERFACE  
Rows are connected to inputs with pull-up and interrupts (Port C). Columns are connected to  
Port A configured as output. The result of the interrupt (the value of the pressed key) is sent on  
LEDS (Port B) and stored into the X register. In our configuration, we have to add 4 pull-up re-  
sistors on Port A (from PA0 to PA3) to be able to apply a high level on the corresponding pads.  
Figure 1. ST7 / keypad interface set-up  
4x100k  
8x560  
V
PC0  
PC1  
PC2  
PC3  
DD  
ST7  
PA0  
PA1  
PA2  
PA3  
GND  
AN980/1098  
1/10  
1

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