Electrical aspects for the stand-alone solution
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6.3
General signals
6.3.1
Brown-out detection
The integrated brown-out detection (BOD) can be used to monitor the
supply voltage. BOD is an analog input signal. Using a resistor divider even
voltages exceeding 3.3 V can be monitored with BOD, e.g. 24 V.
Note:
If the BOD signal (pin 54) is not used, it should be connected with
+3.3 V.
Note:
For more information on brown-out detection, see section 3.5
“Brown-Out Detector (BOD)” of the netX 90 Technical data
reference guide.
6.4
MMIO signals
The MMIO signals MMIO00… MMIO17 can be mapped to various on-chip
peripherals that netX 90 provides for the development of applications:
·
GPIO (8 separate signals GPIO00…GPIO07)
·
I2C (2 clock signals, 2 data signals)
·
SPI (2 interfaces located at APP CPU (
SPI1_APP_*
) and at XPIC
(
SPI_XPIC_APP_*
))
·
UART (2 interfaces located at APP CPU (
SPI1_APP_*
) and at XPIC
(
UART_XPIC_APP_*
))
·
CAN (2 interfaces
CAN0_APP_*
and
CAN0_APP_*
)
·
MII (2 signals ETH_MDC and ETH_MDIO)
·
System watchdog (1 signal WDG_ACT)
·
HIF PIO
·
XC (4 signals for 2 trigger/latch units)
For the configuration of the specific pinout, use the hardware configuration
tool with integrated GUI within netX Studio CDT.
The following requirements apply for the MMIO signals of the netRAPID 90.
·
The signals MMIO00, MMIO01, MMIO02 and MMIO03 may serve as
user defined inputs. They cannot be used, if the encoder interface (BiSS
or EnDat 2.2) is used synchronously.
·
The signals MMIO04, MMIO05, MMIO06 and MMIO07 may serve as
user defined outputs. They cannot be used, if the ADCs are used
synchronously. They also cannot be used, if the encoder interface
(BiSS or EnDat 2.2) is used synchronously.
·
The signals MMIO16 and MMIO17 cannot be used if the SYNC0 and
SYNC1 signals are used.
netRAPID 90 | Design guide
DOC190601DG01EN | Revision 1 (Draft 10) | English | 2019-09 | Preliminary | Public
© Hilscher 2019
