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GAMMA instabus
OEM- Product Catalogue
Release: February 2012
KNX EIB TP-UART 2-IC
Siemens AG pages 42 Technical Manual
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems © Siemens AG 2012 page 1
P. O. Box 10 09 53, Subject to change without further notice.
D-93009 Regensburg
Features
• Signaling for standard UART (LSB-
First, Idle is 1)
• Baud rate 9600 or 19200 for the
communication: TP-UART 2 Host
– Controller
• Direct coupling to host controller (TxD,
RxD), or via optical couplers (optional)
• 2-wire protocol with software
handshake
• Buffering of sent frames
• No critical timing during transmission
• VCC switchable between 3.3 V
and 5 V
• Efficiency of VCC-supply ≥ 75 %
• I
VCC
≤ 30mA (50 mA if no load at V20)
• Switchable V20 power supply
20V/25mA with limiting function
• I
V20max
adjustable in steps
• IVB+max overshoot due to load
changes actively limited
• Operating temperature range: -25°C to
85°C
• Small QFN36X36 package
GENERAL DESCRIPTION
The TP - UART - IC (Twisted Pair - Universal Asynchronous Receive Transmit - IC) is a
transceiver which supports the connection of microcontrollers of sensors, actuators, or other
applications to the EIB (European - Installation - Bus).
This module supports every transmit- and receive - function and also the high ohmic decoupling
of energy from bus line. It generates further a stabilized 3.3V or 5V supply to use by a host
controller. Up to 256 subscribers can be connected to one bus line.
An UART interface is realized for communication with a host controller. The coupling can be
realized directly or via optical couplers.
The TP - UART - IC consists of two main parts: the digital part (UART - Interface) and the analog
part (analog circuit part).
![](https://csdnimg.cn/release/download_crawler_static/89599634/bg2.jpg)
GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
Technical Manual pages 42 Siemens AG
Infrastructure and Cities Sector,
Building Technologies
page 2 © Siemens AG 2012 Control Products and Systems
Subject to change without further notice. P. O. Box 10 09 53,
D-93009 Regensburg
GENERAL DRAWING
Po w er
Su pply
3 0V
TP -UA RT -
IC
+
-
A - Bus
B - B us
Bus Device 1
Bus D evice 2
Bus D evice n
O ptio nal Po wer Sup ply
2 30V / 5 0H z
O ptio nal
Electrical Isolation
(O pto couple r)
TxD
RxD
TxD
RxD
TxD
Rx D
...
TP -UA RT -
IC
TP-U A RT -
IC
A pplication
Applica tion
Applicatio n
STRUCTURE OF TP-UART 2-IC
(Block Diagram)
Filter
1 Byte
Receviebuffer
KNX Receiver
UART Transmitter
64 Byte Sendbuffer
KNX Transmitter
RxD
TxD
RxD3 TxD3
RESn
Physical Address
State flags
ACK Flags
UARTReceiver
Transmit Receive
4,9152 MHz
(2,4576 MHz)
0,05 %
Control logic
RxIN
TxO
![](https://csdnimg.cn/release/download_crawler_static/89599634/bg3.jpg)
GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
Siemens AG pages 42 Technical Manual
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems © Siemens AG 2012 page 3
P. O. Box 10 09 53, Subject to change without further notice.
D-93009 Regensburg
TABLE OF CONTENTS
1 MODES OF OPERATION .......................................................................................................................5
1.1
INTERFACE TO HOST ELECTRONICS........................................................................................................... 5
1.2
SELECTION OF DIFFERENT MODES OF OPERATION................................................................................. 5
2 THE ANALOG – PART ...........................................................................................................................6
2.1
PACKAGE AND PIN DEFINITIONS.................................................................................................................. 6
2.1.1
Package Pin Assignment ........................................................................................................................... 6
2.1.2
PIN DESCRIPTION.................................................................................................................................... 6
2.2
OPERATING CONDITIONS.............................................................................................................................. 8
2.2.1
General operating conditions ..................................................................................................................... 8
2.2.2
ABSOLUTE MAXIMUM RATINGS (NON OPERATING)............................................................................ 8
2.2.3
Bus Pins VB+ and VB ............................................................................................................................. 10
2.2.4
CCS stabilisation Pin BYP........................................................................................................................ 10
2.2.5
Buffer Voltage Pin VSP ............................................................................................................................ 10
2.2.6
Supply Pin VCC........................................................................................................................................ 11
2.2.7
Supply Pin VDP........................................................................................................................................ 12
2.2.8
Supply Pins VDDH and VSSH.................................................................................................................. 12
2.2.9
Supply Pin V20 and Pin R20 .................................................................................................................... 13
2.2.10
Pin IND, SMPSoutput.............................................................................................................................. 14
2.2.11
Pin SVCC ................................................................................................................................................. 14
2.2.12
Receive Pin RxIN ..................................................................................................................................... 14
2.2.13
Transmit Pin TxO ..................................................................................................................................... 15
2.2.14
Supply Pin VIF.......................................................................................................................................... 15
2.2.15
Oscillator Pins X1 and X2......................................................................................................................... 15
2.2.16
Interface Pin RxD ..................................................................................................................................... 15
2.2.17
Interface Pin TxD...................................................................................................................................... 16
2.2.18
Switching Pin STxO.................................................................................................................................. 16
2.2.19
Reset Pin RESn ....................................................................................................................................... 17
2.2.20
Mode Control Pins MODE0, MODE1, MODE2, MODE3 TESTMODE and CTM ..................................... 17
2.2.21
Pin TSTIN_BDS........................................................................................................................................ 17
2.2.22
Pin TSTOUT_TW ..................................................................................................................................... 18
2.2.23
Pin SAVE.................................................................................................................................................. 18
2.2.24
Pin DIV ..................................................................................................................................................... 18
3 DIGITALPART.......................................................................................................................................19
3.1
RELATIONSHIP TO ISOREFERENCEMODEL............................................................................................ 19
3.2
UART – INTERFACE TO HOST CONTROLLER............................................................................................ 20
3.2.1
Configuration and Timing ......................................................................................................................... 20
3.2.2
Resetbehavior .......................................................................................................................................... 20
3.2.3
UARTProtocol Definition ......................................................................................................................... 20
4 MECHANICAL SPECIFICATION ..........................................................................................................34
![](https://csdnimg.cn/release/download_crawler_static/89599634/bg4.jpg)
GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
Technical Manual pages 42 Siemens AG
Infrastructure and Cities Sector,
Building Technologies
page 4 © Siemens AG 2012 Control Products and Systems
Subject to change without further notice. P. O. Box 10 09 53,
D-93009 Regensburg
4.1
PACKAGE....................................................................................................................................................... 34
5 TAPE AND REEL PACKING.................................................................................................................37
6 SOLDERING PROFILE .........................................................................................................................38
7 APPENDIX ............................................................................................................................................39
7.1
TYPICAL APPLICATION CIRCUITS............................................................................................................... 39
7.1.1
Mode of Operation – Normal .................................................................................................................... 39
7.1.2
Mode of Operation – Analog .................................................................................................................... 40
7.2
LAYOUT GUIDELINES................................................................................................................................... 40
![](https://csdnimg.cn/release/download_crawler_static/89599634/bg5.jpg)
GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
Siemens AG pages 42 Technical Manual
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems © Siemens AG 2012 page 5
P. O. Box 10 09 53, Subject to change without further notice.
D-93009 Regensburg
1 Modes of Operation
1.1 Interface to host electronics
TxD
RxD
Normal Mode:
Bus Coupler
Mode:
IDLE = HIGH
IDLE = HIGH
IDLE = LOW
EIB
TP - UART - IC
Analog -
Part
Digital -
Part
TxD3
RxD3
IDLE = LOW
HOST -
Controller
1.2 Selection of Different Modes of Operation
Mode of
operation
MODE TEST MODE CTM TSTIN_BDS TSTOUT_TW
0 1 2 3
Normal 1 1 0 0 0 0
BDS=0: 19.2 kBd
at UART
BDS=1: 9.6 KBd
at UART
TW
Analog
1 0 0 0 0 0 0 TW
Table 1: Modes of Operation
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