Motorola AT Commands G24-LC Información técnica descargar pdf (Pagina 48)

Serial Interfaces

24 G30 - Module Hardware Description December 15, 2009

When G30 receives a call, the RI signal (Ring Indication), initiates pulse indication to the host.

The RI behavior is shown in Figure 2-11.

Figure 2-11: RI Behavior When Receiving a Call

Serial Peripheral Interface (SPI)

The G30 provides a synchronous SPI-compatible serial interface, used for data logging only,

implemented with the synchronous serial controller hardware block of the G30. The SPI is a

master-slave protocol: the module runs as a SPI master device.

The SPI interface includes basically the following signals to transmit and receive data and to

synchronize them:

• MOSI (master output, slave input) signal which is an output for the module while it runs as

SPI master;

• MISO (master input, slave output) signal which is an input for the module while it runs as

SPI master;

• Clock signal which is an output for the module while it runs as SPI master;

• Optional chip select signal which is an output for the module while it runs as SPI master;

• Input Interrupt request SPI_IRQ.

Note: The SPI interface is internally connected to the I

S digital audio interface, and is

controlled by means of software settings. Hence SPI interface is available only if the I

digital audio interface is disabled.

The SPI interface can be used as a data event logger by connecting SPI signals to an external

SPI-UART dedicated interface, and enabling the data logging interface by SW.

Note: In case that the M2M zone platform is being used, the SPI interface can be configured as

GPIOs, disabling the I

S digital audio and SPI interface.

The board to board pins related to SPI interface description are given in Table 2-5:

Table 2-5: SPI Interface Connections

Pin #

(81 pin LGA

interface)

Pin #

(70 pin

connector

interface)

G30

Signal Name

G30

I/O

Function Remarks

762SPI_IRQ I SPI Interrupt Input Generic digital interfaces

voltage domain.

Output driver class C.

PU/PD class B.

Value at reset: T/PD.

I/O Capture/Compare

I/O GPIO

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 117 118

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