Technical information

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
2
S digital audio interface, and is
controlled by means of software settings. Hence SPI interface is available only if the I
2
S
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
2
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