hilscher netRAPID 90, Руководство по конструкции

Страница: 41 / 108

Electrical aspects for the companion solution 41/108
5.3 Host interface
netRAPID 90 supports only one host interface mode, the serial dual-port
memory (SPM).
5.3.1 Serial dual-port memory mode
5.3.1.1 General description
The netRAPID 90 offers a serial dual-port memory interface, which is a SPI
Slave interface. The Serial Peripheral Interface (SPI) is a versatile bus
system for the synchronous serial communication of digital electronic
circuits allowing versatile applications. It is based on the master-slave-
principle. The NRP H90-RE module operates as SPI Slave. The supported
mode is clock idle state high with sampling on the trailing clock edge (SPI
mode 3).
The SPI or QSPI interface allows the host application to access the dual-
port memory. This serial dual-port memory interface has the name SPM.
Thus, the host interface mode is
SPM Host interface .
Table 5 [ } page 37] on page 18 [ } page 37] documents the pin assignment
for netRAPID.
5.3.1.2 Pin assignment of the SPM host interface (SPI/QSPI interface)
The following table gives a description of the pins and the corresponding
signals of the SPM host interface.
Pin Signal Description Mandatory /
optional
11 MMIO15/SPM0_SIO3 Companion mode: Reserved
Stand-alone: Serial data bit 3
Optional
(Mandatory
for QSPI)
12 MMIO14/SPM0_SIO2 Companion mode: Reserved
Stand-alone: Serial data bit 2
Optional
(Mandatory
for QSPI)
13 MMIO13/
SPM0_SIRQ# Companion mode: Reserved
Stand-alone: Service IRQ Optional
14 MMIO12/
SPM0_DIRQ# Optional DIRQ for host (e.g. for data IRQ)
Signal is logically 0 active Optional
15 MMIO11/SPM0_CLK Serial clock (input) Mandatory
16 MMIO10/SPM0_CS# Chip select (input)
Signal is logically 0 active.
Mandatory
17 MMIO9/SPM0_MOSI Master Out Slave In (SPI)/ Serial data bit 0
(QSPI).
Mandatory
18 MMIO8/SPM0_MISO Master In Slave Out (SPI)/ Serial data bit 1
(QSPI)
Mandatory
Table 14: Description of SPM host interface signals
The NRP H90-RE module may operate in SPI mode up to 50 MHz.
netRAPID 90 | Design guide
DOC190601DG01EN | Revision 1 (Draft 10) | English | 2019-09 | Preliminary | Public © Hilscher 2019