Siemens KNX EIB TP-UART 2-IC - Page 7

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 7
P. O. Box 10 09 53, Subject to change without further notice.
D-93009 Regensburg
6 VDDH AIO VSP VB- SMPS control
7 SVCC AIO VCC VB- VCC control
8 VCC AIO 5.5V Clamp
to VB-
VB- External power supply 3.3/5 V
9 IND AIO VSP VB- SMPS-output; no external freewheeling
diode
10 VB- S Ground Negative bus pin, exposed pad (see Figure
5 and 7.2 Layout Guidelines)
11 VB+ S 70V Clamp to
VB-
VB- Positive bus pin
12 BYP AIO VB+ VB- Bypass current stabilisation pin
13 TXO AIO VB+ VB- Transmit output current (bus signal)
14 STxO AIO VB+ VB- Transmitting active indication
15 RxIN AIO VB+ VB- Capacitive coupled to bus signal
16 VB- S Ground Negative bus
pin
17 VIF S 5.5V Clamp
to VB-
VB- External supply for IO cells
18 SAVE DO_PU VIF VB- Signalization of bus voltage break-down
19 RESn DIO_PU VIF VB- Reset pin, open drain with internal pullup
20 RxD DI_PD VIF VB- Data receive from host with internal
pulldown
21 TxD DO VIF VB- Data transmission to host
22
TSTOUT_TW
DO VIF VB- Digital test / temperature signal
23 X1 DI VIF VB- Crystal oscillator pin 1; external clock input
24 X2 DO VIF VB- Crystal oscillator pin 2
25 V20PD DI VDP VB- Enable and disable V20
26 NC2 DIO VDP VB- Used during chip test mode
27 NC3 AIO VDP NA
28 VDP AIO 5.5V Clamp
to VB-
VB- Storage capacitor for internal power supply
29 TSTIN_BDS DIO VDP VB- Input for digital test / baud rate select;
digital output for analog test
30 DIV DI VDP VB- Internal clock divider 2:1 active
31 CTM_AMS DI VDP VB- Chip Test mode control
32 MODE 3 DI VDP VB- Chip Test Mode control pin 4
33 MODE 2 DI VDP VB- Chip Test Mode / Mode control pin 3
34 MODE 1 DI VDP VB- Mode control pin 2
35 MODE 0 DI VDP VB- Mode control pin 1
36 TESTMODE DI VDP VB- Test mode control
Table 2: Pin Description
PIN Types: S ... supply pad
AIO ... analog I/O
DI … digital input
DI_PU ... digital input with pullup