- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄380723 > ST72T251G1M6 (意法半導(dǎo)體) GENERAL DEVICES PART RoHS Compliant: Yes PDF資料下載
參數(shù)資料
| 型號(hào)： | ST72T251G1M6 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | GENERAL DEVICES PART RoHS Compliant: Yes |
| 中文描述： | 8位微控制器有4到8K的光碟/雙層/存儲(chǔ)器，256字節(jié)RAM，ADC的，水分散粒劑，SPI，I2C和2定時(shí)器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 66K |
| 代理商： | ST72T251G1M6 |
AN980/1098
1/10
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
ST7
8x560
PC0
PC1
PC2
PC3
PA0
PA1
PA2
PA3
V
DD
GND
4x100k
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST72251G1M6 | C-649 Series Two-Section Space-saving Slide, Non-Pivoting RoHS Compliant: Yes |
| ST72251G2 | STORAGE, SHELVES CABINET RoHS Compliant: Yes |
| ST72251G2B1 | 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI, I2C AND 2 TIMERS |
| ST72T251G2B3 | 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI, I2C AND 2 TIMERS |
| ST72251G2B3 | 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WDG, SPI, I2C AND 2 TIMERS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST72T251G2B6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST72T251G2M6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST72T311J2B6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST72T311J2T6 | 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/I2C RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST72T311J2T6S | 制造商:STMicroelectronics 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。