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參數資料
型號: TPS65920A2ZCH
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數: 97/115頁
文件大小: 1232K
代理商: TPS65920A2ZCH
Device
Keyboardcontroller
kbd_r_0
kbd_c_0
VCC
Internal
pullup
kbd_r_1
kbd_r_2
kbd_r_3
kbd_r_4
kbd_r_5
kbd_c_1
kbd_c_2
kbd_c_3
kbd_c_4
kbd_c_5
6x6
Keyboardmatrix
037-014
SWCS037G
– MAY 2008 – REVISED APRIL 2011
10
Keyboard
10.1 Keyboard Connection
The keyboard is connected to the chip using:
KBR (5
:0) input pins for row lines
KBC (5
:0) output pins for column lines
Figure 10-1 shows the keyboard connection.
Figure 10-1. Keyboard Connection
When a key button of the keyboard matrix is pressed, the corresponding row and column lines are shorted
together. To allow key press detection, all input pins (KBR) are pulled up to VCC and all output pins (KBC)
are driven to a low level.
Any action on a button generates an interrupt to the sequencer.
The decoding sequence is written to allow detection of simultaneous press actions on several key buttons.
The keyboard interface can be used with a smaller keyboard area than 6
× 6. To use a 3 × 3 keyboard,
KBR(4) and KBR(5) must be tied high to prevent any scanning process distribution.
82
Keyboard
Copyright
2008–2011, Texas Instruments Incorporated
focus.ti.com: TPS65930/TPS65920
相關PDF資料
PDF描述
TPS65920BZCHR SPECIALTY CONSUMER CIRCUIT, PBGA139
TPS65920BZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
TPS65930A2ZCHR SPECIALTY CONSUMER CIRCUIT, PBGA139
TPS65930A2ZCH SPECIALTY CONSUMER CIRCUIT, PBGA139
TPS65930BZCHR SPECIALTY CONSUMER CIRCUIT, PBGA139
相關代理商/技術參數
參數描述
TPS65920A2ZCHR 功能描述:PMIC 解決方案 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65920BZCH 功能描述:開關變換器、穩壓器與控制器 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS65920BZCH 制造商:Texas Instruments 功能描述:Power Supply IC
TPS65920BZCHR 功能描述:開關變換器、穩壓器與控制器 Int Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS65921B1ZQZ 功能描述:PMIC 解決方案 Integrated Power Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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