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TP-UART Scheda tecnica(PDF) 11 Page - Siemens Semiconductor Group |
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TP-UART Scheda tecnica(HTML) 11 Page - Siemens Semiconductor Group |
11 / 26 page TP-UART-IC The reproduction, transmission or use of this document or it‘s contents is not permitted without express written authority. All rights, including right created by patent grant or registration of a utility model or design, are reserved. Technical changes reserved. 25.15.10.41.33a 25.10.01 page 11 The UART-interface works with a clock frequency of 307,2 kHz, if it is chosen 9.6 kbaud (32 sample spots per bit), or 614,4 kHz, if it is chosen 19.2 kbaud (32 sample spots per bit). 3.2.2 Resetbehavior After connecting the operating voltage the TP-UART-IC generates an active reset (level 0 V) at pin RESn. This is valid for all modes. If Normal Mode is activated the following will happen at the UART-interface. TxD will be 0 as long as there was no bus signal on the EIB for 40 Tbit (1 Tbit = 1/9600 s; Attention: The bittime of RxD/TxD depends on the adjusted baudrate at the UART-interface, for example 1 Tbit or 0,5 Tbit). This results in a complete time of 40 Tbit + 12 Tbit = 5,42 ms. Then TxD changes for 1 Tbit to 1 and following the service TPUART-Reset.Indication is transmitted. This signal behavior on TxD appears after each reset. 3.2.3 UART-Protocol Definition The protocol between TP-UART-IC and the application controller is a two wire protocol with software handshake. Each data byte transmitted to the TP-UART-IC is started with a control byte. Each data byte received on the EIB is transparently transmitted through the TP-UART- IC and is therefore started with the EIB control field. Additional Information from the TP- UART-IC is transmitted with an ESC code on the EIB control field. The host controller which is connected to the TP-UART-IC needs to detect a receive time-out of 2 to 2,5 ms to detect an end of Packet. 3.2.3.1 Services to UART The following Services are supported from the TP-UART-IC. • U_Reset.request • U_State.request • U_Activate Busmonitor • U_AckInformation (Nack, Busy, Addressed) • U_L_DataStart + CTRL-Byte • U_L_DataContinue (index) + Data-Byte • U_L_DataEnd + Checksum • U_PollingState (Slotnumber) + PollAddrHigh + PollAddrLow + State UART-Control Field Servicename Hexadecimal 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 1 U_Reset.request 01 0 0 0 0 0 0 1 0 U_State.request 02 0 0 0 0 0 1 0 1 U_ActivateBusmon 05 0 0 0 1 0 X X X U_AckInformation 10 - 17 xxx: Nack,Busy,Addressed 1 0 0 0 0 0 0 0 U_L_DataStart 80 1 0 i i i i i i U_L_DataContinue 81 - BE i = Index 1 .. 62 0 1 l l l l l l U_L_DataEnd 47 - 7F l = last index + 1 7 .. 63 1 1 1 0 s s s s U_PollingState E0 - EF s = Slotnumber 0 .. 14 |
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