E981.03 Datasheet, PDF (16/51 Pages) ELMOS Semiconductor AG – Autonomous MAC and individual physical address

KNX/ EIB TRANSCEIVER
PRODUCTION DATA - JAN 15, 2015
Table 3. KNX frame timing
Description
Condition
Symbol
Min
Typ
Time between end of telegram
upload from host processor to
E981.03 and start of telegram
transmission on EIB bus
(in case of idle EIB bus)
bit TXDEL of
register
UART_CTRL = 0
L_Data or
L_PollData
frame
t_tr,delay,var
Time between end of telegram
upload from host processor to
E981.03 and start of telegram
transmission on EIB bus
(in case of idle EIB bus)
bit TXDEL of
register
UART_CTRL = 0
L_ExtData frame
Wait time after BUSY acknowl-
edge
t_BUSY,rep
104
E981.03
Max Unit
104
μs
250
μs
μs
5.5 AOUT
The pin AOUT is used to monitor several voltages. The
source can be selected by a register value. The analog
monitor signal is not filtered by the E981.03. Especially
the scaled analog bus voltage is not the mean value of
the bus voltage but follows the BUSP line immediately.
Between AOUT buffer and AOUT pin a series resistor of
approximately 10 k is implemented in E981.03. It can be
used to realize a first order RC filter by connecting AOUT
to an external capacitor C_ext. Measurement of AOUT
voltage needs to take the intern resistor value into ac-
count (high impedance measurement input use).
Measurement values are:
• Temperature voltage
• Band gap voltage ¹⁾
• Bus voltage
VIO = 3.3 V
VIO = 5 V
VBUS / 12
VBUS / 8
other multiplexer configuration are invalid
1) The band gap voltage can be used to increase the precision of the ADC.
VBUS/12 ₀
V_BUS/8 ₁
VTemp ₁
2
V_{BG 3}
E981.03
Approx.
+
10kΩ
AOUT
-
AOUT_SRC[0:1]
AOUT_CTRL[0]
Figure 5. Analog Monitoring
AOUT is controlled by Register AOUT_CTRL and Register AOUT_SRC.
external µC
Analog IN
5.6 WK
The WK pin is configurable as output for remote wake-up with trigger telegram or as general purpose input. To con-
figure as a input change bit EN_OUT to “0” in Register TRIGGER (0x214). Default configuration is output. To read
input state read bit WK in the Register PINS.
Elmos Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
Elmos Semiconductor AG
Data Sheet
QM-No.: 25DS0046E.03
16/51