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GAMMA instabus
Release: February 2012
KNX EIB TP-UART 2-IC
2.2.22 Pin TSTOUT_TW
TW = HIGH means: chip temperature is higher than maximum allowed value and TxO is disabled.
Symbol
Parameter
V
Output HIGH voltage
OH
V
Output LOW voltage
OL
t
t
rise time, fall time (10 % ↔ 90 %)
r,
f
2.2.23 Pin SAVE
This pin is an open drain output with internal pull-up resistor to VIF.
In case of break-down of the bus voltage for more than typ. 1.5 ms (save condition) this pin delivers an
active LOW signal to external host electronic.
Symbol
Parameter
R
Value of internal pull-up resistor to VIF
PullUp
V
maximum voltage at SAVE pin
max
V
output low voltage
OL
t
Delay from VB+ break-down to SAVE= LOW
FRG2
(= debounce time of internal signal FRG2)
t
fall time (90 % → 10 %)
f
1) I
of 1mA when VIF=1V; I
OL
2) Rise time determined by R
2.2.24 Pin DIV
This input pin activates an internal 2:1 clock divider. If a 4.9152 MHz clock is used (quartz or external
clock) then pin DIV must be connected to VDP. If an 2.4576 MHz clock is used (only external clock)
then this pin must be connected to VB-.
Symbol
Parameter
V
voltage range for input low level
IL
V
voltage range for input high level
IH
Technical Manual
page 18
Table 23 Pin TSTOUT_TW
of 5mA when VIF
3V
OL
, C
and VIF
PullUp
L
Table 24 Pin SAVE
Table 25 Pin DIV
pages 42
© Siemens AG 2012
Subject to change without further notice.
Min
Max
VIF - 0.5
0.4
100
Min
Max
10
25
VIF + 0.5
0.2
0.7
3
100
Min
Max
0
0.3 * VDP
0.7 * VDP
1.0 * VDP
Infrastructure and Cities Sector,
Building Technologies
Control Products and Systems
D-93009 Regensburg
Unit
Note
V
I
= -5 mA
OH
V
I
= 5 mA
OL
ns
C
= 150 pF
L
Unit
Note
kΩ
V
V
1)
ms
Typ. 1.5 ms
ns
C
= 150 pF 2)
L
Unit
Note
Siemens AG
P. O. Box 10 09 53,
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