McIntosh Laboratory Inc CR870-2Q Manuel D’Utilisation
JukeBlox Networked Media Modules – CR Series
Datasheet
SMSC CR860/CR870
18
Revision 3.8 (01-11-12)
SMSC CONFIDENTIAL
8.2.1 Pin Descriptions
Signal(s)
Type
Description
POWER
VIN(+3.3V)
P
Power supply input ; +3.3V.
VIN (+1.2V)
P
Power supply input ; +1.2V.
VIN_OUTSIDE(+1.9V)
P
+1.9V for powering RF section. This voltage is generated internally on the module from the
3.3V supply for all current module versions. Leave these pins open.
3.3V supply for all current module versions. Leave these pins open.
3V3RTC
P
The RTC function is no longer supported. This pin should be left open.
GND
P
Ground (GND) connection for power supply 0V, signal returns and shielding.
SPI
SPI_DOUT
O
SPI data from DM870 to host controller.
SPI_DIN
I
SPI data from host controller to DM870.
SPI_CLK
I
SPI clock from host controller to DM870. Maximum recommended frequency is 2MHz,
typical frequency is 1MHz. See Note 2 below.
typical frequency is 1MHz. See Note 2 below.
SPI_NCS0
I
SPI chip select from host controller to DM870.
PDOUT1
O
This signal is used as SPI_REQ, SPI request signal, from DM870 to host controller for
eDMP applications. Logic 1 indicates that there is an SPI message waiting to be read, the
host controller should start the SPI clock and read any changed registers. Logic 0
indicates that all changed register messages have been read and the message buffer is
empty. Also GPIO-06.
host controller should start the SPI clock and read any changed registers. Logic 0
indicates that all changed register messages have been read and the message buffer is
empty. Also GPIO-06.
SPI_NCS1
I
Not used. Leave open.
UART
RXD1
I
UART1 input to the DM870, used for shell access. SMSC recommends providing a
connection to an external RS-232 transceiver and DB9 connector to connect to a PC COM
port. Such a connection can be used for product development debugging, and for module
programming control on the product manufacturing line and for module control during
certification procedures.
connection to an external RS-232 transceiver and DB9 connector to connect to a PC COM
port. Such a connection can be used for product development debugging, and for module
programming control on the product manufacturing line and for module control during
certification procedures.
TXD1
O
UART1 output from the DM870, used for shell access. SMSC recommends providing a
connection to an external RS-232 transceiver and DB9 connector to connect to a PC COM
port. Such a connection can be used for product development debugging, and for module
programming control on the product manufacturing line and for module control during
certification procedures.
connection to an external RS-232 transceiver and DB9 connector to connect to a PC COM
port. Such a connection can be used for product development debugging, and for module
programming control on the product manufacturing line and for module control during
certification procedures.
RXD0
I
UART0 input. Optionally used for controlling an iPod via UART.
TXD0
O
UART0 output. Optionally used for controlling an iPod via UART.