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| 型號： | STMPE2401TBR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 24 I/O, PIA-GENERAL PURPOSE, PBGA36 |
| 封裝： | LEAD FREE, TFBGA-36 |
| 文件頁數(shù)： | 36/55頁 |
| 文件大?。?/td> | 959K |
| 代理商： | STMPE2401TBR |
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STMPE2401
Keypad controller
41/55
The keypad column inputs enabled by the KPC_col register are normally ‘HIGH’, with the
corresponding input pins pulled up by resistors internally. After reset, all the keypad row
outputs enabled by the KPC_row register are driven ‘LOW’. If a key is pressed, its
corresponding column input will become ‘LOW’ after making contact with the ‘LOW’ voltage
on its corresponding row output.
Once the key scan controller senses a ‘LOW’ input on any of the column inputs, the
scanning cycles will then start to determine the exact key that has been pressed. The twelve
row outputs will be driven ‘LOW’ one by one (if the row output is enabled) during each
scanning cycle. While one row is driven ‘LOW’, the other rows are driven ‘HIGH’. (The pull-
ups and pull-downs of row outputs are always disabled). If there is any column input sensed
as ‘LOW’ when a row is driven ‘LOW’, the key scan controller will then decode the key
coordinates (its corresponding row number and column number), save the key data into a
de-bounce buffer if available, confirm if it is a valid key press after de-bouncing, and update
the key data into output data FIFO if valid.
13.1
Registers in keypad controller
Table 37. Register in keypad controller
Address
Register name
Description
Auto-Increment
(during sequential
R/W)
0x60
KPC_col
Keypad column scanning register
Yes
0x61
KPC_row_msb
Keypad row scanning register
Yes
0x62
KPC_row_lsb
Yes
0x63
KPC_ctrl_msb
Keypad control register
Yes
0x64
KPC_ctrl_lsb
Yes
0x68
KPC_data_byte0
Keypad data register
No
0x69
KPC_data_byte1
No
0x6A
KPC_data_byte2
No
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| STMPE2403 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:24-bit Enhanced port expander with Keypad and PWM controller Xpander logic |
| STMPE2403TBR | 功能描述:接口 - 專用 24-bit Enhanced RoHS:否 制造商:Texas Instruments 產品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:BGA-59 |
| STMPE24M31QTR | 功能描述:電容觸摸傳感器 S-Touch 24 Cap Sens 15fF 512 Steps 30pF RoHS:否 制造商:Microchip Technology 電源電壓: 通道數(shù)量: 封裝 / 箱體: 尺寸: 溫度范圍: |
| STMPE321 | 制造商:STMicroelectronics 功能描述:3-channel touchkey controller |
| STMPE321QTR | 功能描述:觸摸屏轉換器和控制器 3-channel CAP Touch Key Controller RoHS:否 制造商:Microchip Technology 類型:Resistive Touch Controllers 輸入類型:3 Key 數(shù)據速率:140 SPS 分辨率:10 bit 接口類型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20 |
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