Interfaces; 10/100 Mbps Ethernet Port; Uart; Spi - Digi ConnectCore Wi-9P 9215 Hardware Reference Manual

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Interfaces

10/100 Mbps Ethernet port

The Digi NS9215 processor's 10/100 Mbps Ethernet MAC allows a glueless connection
of a 3.3V MII PHY chip that generates the physical Ethernet signals.
The module has a MII PHY chip in a 56-pin QFN package on board. By default, the
module does not have a transformer or Ethernet connector; the Development Board
must provide these parts. However, it's possible to populate a specific RJ45 connector
with magnetics on the module. The appropriate RJ-45 is Midcom MIC2412A-5108W-
LF3.
A PHY clock of 25 MHz is generated in the PHY chip with a 25 MHz crystal.
GPIO90 is controlling the PHY RESET# signal. This GPIO has a 2k2 pull-down resistor
to GND populated on the module. GPIO90 must be asserted high before PHY can be
used. When not used, the PHY can be put in low-power mode by asserting GPIO90
low.
The PHY address on the MII bus is 0x7 (0b00111).
In addition to providing access to the Ethernet signals coming out of the PHY, the
module also supports two status LEDs: ETH_ACTIVITY# and ETH_LINK#.

UART

The ConnectCore 9P 9215 and ConnectCore Wi-9P 9215 modules provide up to four
UART ports, used in asynchronous mode:
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The module supports baud rates up to 1.8432 Mbps in asynchronous mode. Each
UART has a 64-byte TX and RX FIFO available.

SPI

The following interfaces are only available on the ConnectCore 9P 9215 and
ConnectCore Wi-9P 9215.
The module provides one SPI port which can be used in either master or slave mode.
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The SPI module is made of four signals: RXD, TXD, CLK and CS#.
ConnectCore 9P 9215, Wi-9P 9215 and 3G 9P 9215 Hardware Reference
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Port A = GPIOO through GPIO7
Port B = GPIO51 through GPIO58
Port C = GPIO8 through GPIO15
Port D = GPIO59 through GPIO66
Master: 33.33 Mbps
Slave: 7.50 Mbps