ZHCS290G
September 2009 – June 2018
TCA8418
PRODUCTION DATA.
1
特性
2
应用范围
3
说明
Device Images
简化原理图
4
修订历史记录
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
I2C Interface Timing Requirements
6.7
Reset Timing Requirements
6.8
Switching Characteristics
6.9
Keypad Switching Characteristics
6.10
Typical Characteristics
7
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Key Events
8.3.1.1
Key Event Table
8.3.1.2
General Purpose Input (GPI) Events
8.3.1.3
Key Event (FIFO) Reading
8.3.1.4
Key Event Overflow
8.3.2
Keypad Lock/Unlock
8.3.3
Keypad Lock Interrupt Mask Timer
8.3.4
Control-Alt-Delete Support
8.3.5
Interrupt Output
8.3.5.1
50 Micro-second Interrupt Configuration
8.4
Device Functional Modes
8.4.1
Power-On Reset (POR)
8.4.2
Powered (Key Scan Mode)
8.4.2.1
Idle Key Scan Mode
8.4.2.2
Active Key Scan Mode
8.5
Programming
8.5.1
I2C Interface
8.5.2
Bus Transactions
8.5.2.1
Writes
8.5.2.2
Reads
8.6
Register Maps
8.6.1
Device Address
8.6.2
Control Register and Command Byte
8.6.2.1
Configuration Register (Address 0x01)
8.6.2.2
Interrupt Status Register, INT_STAT (Address 0x02)
8.6.2.3
Key Lock and Event Counter Register, KEY_LCK_EC (Address 0x03)
8.6.2.4
Key Event Registers (FIFO), KEY_EVENT_A–J (Address 0x04–0x0D)
8.6.2.5
Keypad Lock1 to Lock2 Timer Register, KP_LCK_TIMER (Address 0x0E)
8.6.2.6
Unlock1 and Unlock2 Registers, UNLOCK1/2 (Address 0x0F-0x10)
8.6.2.7
GPIO Interrupt Status Registers, GPIO_INT_STAT1–3 (Address 0x11–0x13)
8.6.2.8
GPIO Data Status Registers, GPIO_DAT_STAT1–3 (Address 0x14–0x16)
8.6.2.9
GPIO Data Out Registers, GPIO_DAT_OUT1–3 (Address 0x17–0x19)
8.6.2.10
GPIO Interrupt Enable Registers, GPIO_INT_EN1–3 (Address 0x1A–0x1C)
8.6.2.11
Keypad or GPIO Selection Registers, KP_GPIO1–3 (Address 0x1D–0x1F)
8.6.2.12
GPI Event Mode Registers, GPI_EM1–3 (Address 0x20–0x22)
8.6.2.13
GPIO Data Direction Registers, GPIO_DIR1–3 (Address 0x23–0x25)
8.6.2.14
GPIO Edge/Level Detect Registers, GPIO_INT_LVL1–3 (Address 0x26–0x28)
8.6.2.15
Debounce Disable Registers, DEBOUNCE_DIS1–3 (Address 0x29–0x2B)
8.6.2.16
GPIO pull-up Disable Register, GPIO_PULL1–3 (Address 0x2C–0x2E)
8.6.3
CAD Interrupt Errata
8.6.3.1
Description
8.6.3.2
System Impact
8.6.3.3
System Workaround
8.6.4
Overflow Errata
8.6.4.1
Description
8.6.4.2
System Impact
8.6.4.3
System Workaround
9
Application and Implementation
9.1
Application Information
9.1.1
Ghosting Considerations
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Designing the Hardware Layout
9.2.2.2
Configuring the Registers
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
器件和文档支持
12.1
接收文档更新通知
12.2
社区资源
12.3
商标
12.4
静电放电警告
12.5
术语表
13
机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
RTW|24
MPQF167C
散热焊盘机械数据 (封装 | 引脚)
RTW|24
QFND062N
订购信息
zhcs290g_oa
zhcs290g_pm
1
特性
工作电源电压范围:1.65V 至 3.6V
可借助 18 个通用输入输出 (GPIO) 支持 80 个按钮
支持 QWERTY 键盘操作和通用输入输出 (GPIO) 扩展
低待机(空闲)电流消耗:3μA
支持 1MHz 快速模式加上 I
2
C 总线
10 字节先入先出 (FIFO) 可存储 10 次按键按压和释放操作
开漏电路低电平有效中断输出
集成消抖时间为 50μs
施密特触发器操作可在 SCL 和 SDA 输入端实现缓慢输入转换和更好的开关噪声抗扰度:1.8V 时的 V
hys
典型值为 0.18V
锁断性能超过 200mA,符合 JESD 78 II 类规范的要求
全部 18 个 GPIO 引脚和非 GPIO 引脚上的 ESD 保护均超出 JESD 22 规范要求
2000V 人体放电模型 (A114-A)
1000V 器件充电模型 (C101)
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