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参数资料
| 型号： | TCA8418EYFPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, BGA25 |
| 封装： | 2 X 2 MM, 0.40 MM PITCH, DSBGA-25 |
| 文件页数： | 11/31页 |
| 文件大小： | 400K |
| 代理商： | TCA8418EYFPR |
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DEBOUNCE ENABLED
GPI with
E
INT
VALID HIGH TRIGGER INTERRUPT
50
s
m
VALID LOW TRIGGER INTERRUPT
50
s
m
DEBOUNCE ENABLED
GPI with
E
INT
VALID HIGH TRIGGER INTERRUPT
VALID LOW TRIGGER INTERRUPT
COL COL COL COL COL COL COL COL COL COL
ROW
X7
ROW
X3
ROW
X6
ROW
X2
ROW
X5
ROW
X1
ROW
X4
ROW
X0
www.ti.com
SCPS222B – MAY 2010 – REVISED SEPTEMBER 2010
Debounce disable will have the same effect for GPI mode or for rows in keypad scanning mode. The reset line
always has a 50-ms debounce time.
The debounce time for inputs is the time required for the input to be stable to be noticed. This time is 50 ms.
The debounce time for the keypad is for the columns only. The minimum time is 25 ms. All columns are scanned
once every 25 ms to detect any key presses. Two full scans are required to see if any keys were pressed. If the
first scan is done just after a key press, it will take 25 ms to detect the key press. If the first scan is down much
later than the key press, it will take 40 ms to detect a key press.
GPIO Pull Disable Register, GPIO_PULL1–3 (Address 0×2C–0×2E)
This register enables or disables pullup registers from inputs.
Typical Application
Figure 8 shows an application in which the TCA8418E can be used.
Copyright 2010, Texas Instruments Incorporated
19
Product Folder Link(s): TCA8418E
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TCA8418EYFPR | 制造商:Texas Instruments 功能描述:IC I2C CONTROLLED KEYPAD SCAN 3.6V 25 |
| TCA8418RTWR | 功能描述:I2C 接口集成电路 Low-Vltg 16B I2C & SMBus I/O Expander RoHS:否 制造商:NXP Semiconductors 电源电压-最大:5.5 V 电源电压-最小:2.3 V 最大工作频率:400 KHz 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-16 |
| TCA8418YFPR | 制造商:TI 制造商全称:Texas Instruments 功能描述:I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION |
| TCA8424 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Check for Samples: TCA8424 |
| TCA8424EVM-038 | 功能描述:界面开发工具 TCA8424 EVAL MOD RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
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