KNX开发关键芯片：GAMMAinstabus TP-UART2-ICS简介

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本文档详细介绍了KNX开发过程中所使用的GAMMAinstabus的KNXEIBTP-UART2-ICSiemensAG产品规格和技术手册。KNX（Kommunikationstechnische Norm）是一种欧洲标准的智能家居和楼宇自动化系统，它通过EIB（European Installation Bus）协议进行通信。这款特定的TP-UART2 IC（Twisted Pair Universal Asynchronous Receiver Transmitter Integrated Circuit）芯片是专为KNX应用设计的通信接口。核心功能包括： 1. **标准UART信号处理**：支持LSB-First模式，空闲状态设置为1，确保数据传输的准确性。 2. **多种波特率支持**：提供9600或19200 baud的通信速率选项，适用于主机控制器之间的高效通信。 3. **接口灵活性**：可直接与主机控制器连接，也可通过光学耦合器实现隔离，以适应不同应用场景。 4. **软件握手机制**：采用2-wire协议，带有软件握手功能，保证数据传输的可靠性和同步。 5. **帧缓冲**：能够缓冲发送的数据，减少数据丢失的风险。 6. **非关键性时间管理**：在数据传输过程中，避免了严格的定时要求，提高了系统的实时响应能力。 7. **电源兼容性**：支持VCC电压范围，可以从3.3V切换到5V，功耗低至30mA（在无负载条件下），并且提供20V/25mA的可调电源选项。 8. **电压限制功能**：当负载变化时，自动限制V20电压的过度上升，保护电路稳定。 9. **宽温度范围**：工作温度区间为-25°C至85°C，确保在各种环境条件下都能正常运行。 10. **小型封装**：采用紧凑的QFN36x36封装，节省空间，适合集成到各种尺寸的设备中。这款KNXEIBTP-UART2-ICSiemensAG芯片是KNX系统中不可或缺的组件，其高性能、灵活性和可靠性对于KNX系统的扩展和集成至关重要。设计者和开发者可以利用这些特性来构建高效、兼容且稳定的KNX网络系统。

GAMMA instabus

Release: August 2013

KNX EIB TP-UART 2 - IC

Technical Manual pages 43 Siemens AG

Infrastructure and Cities Sector,

Building Technologies

page 8 © Siemens AG 2013 Control Products and Systems

Subject to change without further notice. P. O. Box 10 09 53,

D-93009 Regensburg

DI_PD ... digital input with pull-down

DIO_PU ... digital I/O with pull-up

DO ... digital output

DO_PU ... digital output with pull-up

NC ... Not connected. Recommend to be tied to VB- in the application.

2.2 OPERATING CONDITIONS

2.2.1 General operating conditions

All specification parameters, unless otherwise stated, are valid within the General operating

conditions. Unless otherwise stated all voltages are referenced to the VB- pin.

Symbol Parameter Min Max Unit

Note

VB+ positive line voltage 11 45 V 1)

5.0 - 5% 5.0 + 5% V 2) V

positive supply voltage for external supply

(digital test modes with SHB = 0)

3.3 - 5% 3.3 + 5% V 2)

positive external supply voltage 3.0 5.5 V

amb

ambient temperature -25 85 ºC

jnc1

Junction temperature 125 ºC

clk

clock frequency (external quartz) 4.9152 MHz

1) DC voltage of bus is 20V to 30V, with signal and compensation pulse 11 V ... 45 V

2) set by SVCC

3) 4.915MHz external clock running

Table 3 General operating conditions

2.2.2 ABSOLUTE MAXIMUM RATINGS (NON OPERATING)

Stresses beyond those listed under “Absolute Maximum Ratings“ may cause permanent damage to

the device. These are stress ratings only. Functional operation of the device at these or any other

conditions beyond those indicated under “Operating Conditions” is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability. Unless otherwise

stated all voltages are referenced to the VB- pin.

Parameter Symbol Min Max Unit Note

positive line voltage VB+ -0.3 50 V 1)

positive supp

ly voltage (internal or

external supply)

-0.3 7 V 2)

positive external supply voltage V

-0.3 7 V 2)

intermediate voltage (generated

by on-chip regulator)

VSP

-0.3 50 V 2)

voltage on pin TxO V

TxO

-0.3 50 V 1)

voltage on pin RxIN V

RxIN

-0.3 50 V 1), 4)

voltage on pin BYP V

BYP

-0.3 50 V 1)

voltage on pin STxO V

STxO

-0.3 50 V 1)

GAMMA instabus

Release: August 2013

KNX EIB TP-UART 2 - IC

Siemens AG pages 43 Technical Manual

Infrastructure and Cities Sector,

Building Technologies

Control Products and Systems © Siemens AG 2013 page 9

P. O. Box 10 09 53, Subject to change without further notice.

D-93009 Regensburg

Parameter Symbol Min Max Unit Note

voltage on pin V20 V

-0.3 25 V 2)

voltage on pin IND V

IND

-0.3 50 V

voltage on low voltage pins

MODE0, MODE1, MODE2,

MODE3, TSTIN_BDS,

TESTMODE, DIV, SVCC, CTM

LV1

-0.3 V

+0.5 V 9)

voltage on low voltage pins TxD,

RESn, TSTOUT_TW, X1, X2,

RxD, SAVE

LV2

-0.3 V

+0.5 V 5)

Internal supply voltage to digital

part

VDP

-0.3 5 V

voltage used for internal DC/DC-

converter

VDDH

-0.3 50 V

voltage used for internal DC/DC-

converter

VSSH

-0.3 50 V

Ambient temperature T

amb

-25 85

Junction temperature T

145

storage temperature T

-65 150

ESD stress voltage that will not

cause damage to the device

ESD

± 1200 V 3)

static current for latchup

initialization

LATCHUP

± 50 mA

thermal resistance of QFN

package to ambient

tha

28 K/W 6)

thermal resistance of QFN

package to package surface

measured on exposed paddle

ths

5 K/W 6)

Total power dissipation at T

amb

C (all supplies and outputs)

1.4 W TW not active 7)

Humidity non-condensing H

5 93 % 8)

Table 4 Absolute maximum ratings

Notes:

(1) during surge impulse: -20 V for 2 µsec and +65 V for 150 µsec

(2) In particular allowed voltage relations (no damage under following voltage relations):

(a) V

VSP

³ VB+; e.g. VB+ = 0 V due to a short circuit

(b) V

V20

³ V

VSP;

e.g. V

VSP

= 0 V due to a short circuit or VB+ = 0 V

VCC

³ V

VSP;

e.g. V

VSP

= 0 V due to a short circuit or VB+ = 0 V

(d) V

³ V

VCC

; e.g. when an external supply for V

is used and VB+ = 0 V

(e) V

and V

VSP

normal / VB+ and V

can be 0 V

(f) V

VSP

normal / V

, VB+ and V

can be 0 V

(g) V

normal / V

, VB+ and V

VSP

can be 0 V

(h) V

³ V

VSP

; e.g during normal startup sequence.

(3) human body model: 100 pF, 1.5 kW, Mil. Std. 883, method 3015.7

(4) dynamic via C

REC

= 47 nF in case of switching-on/off the bus voltage, complies with V

CREC

at normal

operation, may be down to -20 V.

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