Cypress TMA445 TrueTouch 多点触控控制器技术规格

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"Cypress TMA445 是一款TrueTouch系列的多点触控屏幕控制器，专门设计用于实现高精度和高性能的触摸屏功能。该芯片由 Cypress Semiconductor Corporation 制造，具有多种先进技术来增强其在各种环境条件下的性能。" Cypress TMA445 触摸芯片是一款32位ARM Cortex™ CPU驱动的多点触控控制器，它提供了丰富的功能和配置选项。其主要特性包括： 1. **噪声抑制技术**：针对电池充电器和显示屏的噪声问题，Cypress TMA445 集成了噪声抑制技术，如28伏驱动以提高信噪比(SNR)，Charger Armor技术提高了对充电噪声的免疫力，以及外部显示同步功能。 2. **防水和湿手指追踪**：采用 DualSense™ 技术，能够在水滴存在或手指湿润的情况下准确追踪触摸操作。 3. **多点触控手套模式**：支持10根手指（穿戴≤1毫米厚度的薄手套）和2根手指（穿戴≤5毫米厚度的厚手套）的触控操作，自动模式切换适应不同场景。 4. **指甲追踪**：用户即使使用指甲也能实现精确的触控操作。 5. **面部检测与握持抑制**：通过识别面部和手部握持设备的差异，减少误触的可能性。 6. **大物体排斥**：能够区分大物体（如手掌）与手指触控，避免误识别。 7. **自动基线跟踪**：根据环境变化自动调整，确保触摸检测的准确性。 8. **低功耗待机模式**：在未检测到触摸时进入低功耗状态，节省能源。 9. **现场升级**：通过内置的引导加载程序进行固件升级，方便产品维护和更新。 10. **操作系统支持**：提供对Android™和Windows Phone 8操作系统的驱动支持。 11. **Cypress Manufacturing Test Kit (MTK)**：包含测试工具，方便制造商进行触摸屏传感器的自我检测和面板识别。 Cypress TMA445 是一款高度集成、具备智能功能的触摸屏控制器，旨在提供卓越的用户体验，特别是在复杂环境和条件下。其强大的噪声抑制技术和对不同用户交互方式的支持，使其成为移动设备和消费电子产品的理想选择。

CYTMA445

CONFIDENTIAL - RELEASED ONLY UNDER NONDISCLOSURE AGREEMENT (NDA)

Document Number: 001-88720 Rev. *F Page 6 of 31

Touchscreen System Specifications

This section specifies the touchscreen system performance delivered by the CYTMA445. For definitions, justification of parameters,

and test methodologies, refer to the Cypress specification TrueTouch

Touchscreen Controller User Interface Performance

Definitions (001-49389)

[1]

System Performance Specifications

The System Performance Specifications in Table 1

[2]

and Table 2

[3]

are valid under these conditions: –40 °C ≤ T

≤ 85 °C,

1.71 V ≤ V

DDD

≤ 5.5 V, 1.71 V ≤ V

CCD

≤ 1.95 V, 2.65 V ≤ V

DDA

≤ 5.5 V, unless otherwise noted. Typical values are specified at

=25°C, V

DDD

= V

CCD

= 1.8 V, core low-dropout regulator (LDO) disabled, and V

DDA

= 3.3 V (V

CCTX

bulk storage capacitor

present), unless otherwise noted. Data was taken on a sensor with 4.7 mm pitch.

Contact your local Cypress sales representative for information on the system performance conditions to guarantee the specifications

in Table 1. The performance conditions and specifications are valid only for sensors approved by Cypress for use with the CYTMA445

and produced by qualified Cypress partners. Contact TrueTouch@cypress.com to discuss any deviations.

Table 1. Typical System Performance Specifications (Configuration Dependent)

Category Conditions Core Units

Accuracy 4–6 mm diameter finger 0.35 mm

6 < finger diameter ≤ 12 mm 0.4 mm

Glove (1–5 mm thickness) 1 mm

Linearity 4–12 mm diameter finger 0.15 mm

Glove (1–5 mm thickness) 0.5 mm

Table 2. System Performance Specifications (Configuration Dependent)

Category Description Conditions Min Typ Max Units

Jitter Delta in reported X,Y position,

for non-moving finger

4–12 mm diameter finger – 0.15 0.25 mm

Refresh rate One finger on panel 60 120 300

[4]

Noise Handling Charger noise immunity 1 kHz to 500 kHz at 1-kHz steps, 50% duty

cycle, no false touches, no false lift-offs,

9-mm finger, min 60-Hz refresh rate

35 – – V

Response

Time

Active state response time First finger down, min look-for-touch refresh

interval, 120-Hz refresh rate

––13ms

Active Look-for-touch state

response time

First finger down – – 35 ms

Wake from Deep Sleep

response time

Time from host wake of device to first touch

report

––100ms

Power In Active state One finger, 60-Hz refresh rate – 24.5 – mW

In Active Look-for-touch state – 4 – mW

Average Power

[5]

TrueTouch device in Active state for 25% of

touch activity and Deep Sleep state for 75%

of touch activity.

–6.1–mW

In Deep Sleep state – 4.5 – μW

Notes

1. Cypress reference documents are available under NDA through your local Cypress sales representative. You can also direct your requests to

TrueTouch@cypress.com.

2. Typical, as represented by 85% of the sample data measured. Accuracy is measured at points across the entire panel at 1.1 mm intervals. Linearity is measured on

lines drawn across the panel (vertically, horizontally, and diagonally) separated by 1.1 mm.

3. Typical, as represented by the average values from the Cypress specification, TrueTouch

Touchscreen Controller User Interface Performance Definitions

(001-49389). Cypress reference documents are available under NDA through your local Cypress sales representative. You can also direct your requests to

TrueTouch@cypress.com.

4. Requires setting TX Pulses for mutual-cap and self-cap to 8 in a no noise environment.

5. See “Power States Summary” on page 11 for power state transition details and refresh interval configuration for each state. Average power is calculated using this

equation: 0.25 × 24.5 mW + 0.75 × 0.0045 mW = 6.1 mW.