音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

ST72T251G2B6 Datasheet

  • ST72T251G2B6

  • 8-BIT MCU WITH 4 TO 8K ROM/OTP/EPROM, 256 BYTES RAM, ADC, WD...

  • 11頁

  • STMICROELECTRONICS   STMICROELECTRONICS

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

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
DD
PC0
PC1
PC2
PC3
ST7
PA0
PA1
PA2
GND
PA3
AN980/1098
1/10
1

ST72T251G2B6 產(chǎn)品屬性

  • STMicroelectronics

  • 8-bit Microcontrollers (MCU)

  • ST7

  • 8 bit

  • 8 MHz

  • 8 KB

  • 256 B

  • Yes

  • PDIP-32

  • Through Hole

  • 8 bit

  • 6

  • 8 KB

  • 3.56 mm

  • I2C, SPI

  • 28.45 mm

  • + 85 C

  • - 40 C

  • 8

  • 2 x 16 bit

  • Tube

  • EPROM

  • 16

  • 5.5 V

  • 3.5 V

  • 8.89 mm

ST72T251G2B6相關(guān)型號(hào)PDF文件下載

您可能感興趣的PDF文件資料

熱門IC型號(hào)推薦

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋
返回頂部

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動(dòng)力！意見一經(jīng)采納，將有感恩紅包奉上哦！