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Hardware
The I2C#2 bus controls and configures the TVP5158 video decoder with the default I2C slave address
0x58. The DS90UH926Q deserializer is also on the I2C#2 bus with the same slave address. Only one set
of inputs can be used at a time, either the TVP5158 or the FPD-Link III. Selection of the device is
controlled by an I2C GPIO expander on I2C#1 or #4 bus. The controlling I2C bus is selectable with the
same DIP switch that controls the tuner I2C bus, SW2. Whatever I2C bus is selected for the tuners is the
same bus that controls the I2C expander that selects the state of the video mux. For SW2 switch details,
see
Section
3.2. Video characteristics including hue, contrast, brightness, saturation, and sharpness can
be programmed via the I2C bus. FPD-Link III audio output is routed into the processor through McASP6.
3.5
Portable Media and iPod
A standard SD card socket is included on the JAMR3 board. SD cards (the socket may need to be placed
on the PCB bottom side).
An iPod can be connected to JAMR3 via a daughter card that includes an iPod authentication chip. A
header is provided for the daughter card. With iPod authentication, JAMR3 can navigate the iPod file
system and control and play back the media files from the iPod player.
3.6
iPod Authentication and HD Radio Conditional Access
iPod authentication is required in order to connect an iPod device. A 10-pin Samtec (SFM-105-02-S-D-LC)
connector is populated and routes necessary signals for a prospective authentication daughter card, the
signals include the followings:
•
I2C#3 bus
•
SYS_RESET
•
3.3 V supply
HD radio conditional access allows the system to bring up HD radio function, a 10-pin Samtec (SFM-105-
02-S-D-LC) connector routes the following signals for a prospective daughter card:
•
I2C#3 bus
•
System reset: SYS_RESET ORed with GP5[0]
•
GP5[22] and GP5[30]
•
3.3 V supply
4
Debug Capability
The CDM connector is for HD Radio command and control using I2C#3 with an Aardvark; a 3M connector
(part #: 30310-6002HB) should be used.
A Mini USB to I2C#3 converter interface utilizing an MSP430
the need to always use an Aardvark. The radio system can be controlled through a USB gateway interface
on the MSP430 to I2C#3.
Other debug interfaces will be on the processor board, like JTAG, RS232, Ethernet, and so forth.
5
Major Components and Connectors
•
RF Signal Path
– Dual Band DAB LNA's: U1, U2, U3, U4, Texas Instruments, AFE8316A1RGTR, QFN16
– RF 2 bits Tuner Processors: U6, U7, U8, and U9, Texas Instruments, AFE8310DRVB, QFN56
•
Audio Codec's: U24, U25 and U26, Texas Instruments, TLV320AIC3106-Q1
•
Power Supply
– Supervisor: U23, Texas Instruments, TPS3808
– 1.1 V Supply: U16, Texas Instruments, TPS74701
– 1.8 V Supply: U43, Texas Instruments, TPS74701
– 3.8 V Supply: U28, Texas Instruments, TPS54362-Q1
– 3.3 V Maxwell Supplies: U12 and U13, Texas Instruments, TPS75233-Q1
24
JAMR3
Copyright © 2016, Texas Instruments Incorporated
[15]
is built onto the board. This eliminates
SPRUI52 – February 2016
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