USER MANUAL
TCM 410J
–
Transceiver Module
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TCM 410J User Manual | v2.3 | June 2022 | Page 10 / 46
2.2.1
GPIO supply voltage - IOVDD
For digital communication with other circuitry (peripherals) the digital I/O configured pins of
the mixed-signal sensor interface (ADIO0 to ADIO7) and the pins of the serial interface
(SCSEDIO0, SCLKDIO1, WSDADIO2, RSDADIO3) may be operated from supply voltages dif-
ferent from DVDD.
To do so, an input for supplying the interface voltage (IOVDD) is available which can be
connected either to DVDD (to use the same voltage as the supply voltage) or to an external
supply with a different voltage within the tolerated voltage range of IOVDD.
If DVDD=0 V (e.g. in any sleep mode or if VDD<VOFF) and IOVDD is supplied,
then there may be unpredictable and varying current from IOVDD caused by in-
ternal floating nodes. It must be assured that current flowing into IOVDD does not
exceed 10 mA while DVDD=0 V.
If DVDD=0 V and IOVDD is not supplied, then do not apply voltage to any of the
above-mentioned pins. Doing so may lead to unpredictable malfunction of the de-
vice.
For I/O pins configured as analogue pins the IOVDD voltage level is not relevant!
However it is important to connect IOVDD to a supply voltage as specified in 2.4.
IOVDD
A
D
IO
0
A
D
IO
1
A
D
IO
2
A
D
IO
3
A
D
IO
4
A
D
IO
5
A
D
IO
6
A
D
IO
7
S
C
S
E
D
IO
0
S
C
LK
D
IO
1
W
S
D
A
D
IO
2
R
S
D
A
D
IO
3
If configured as digital I/O
