We plan to support this device as long as TI continues to support the AM335x device. In fact, we will most likely be able to support it longer than TI will.
One is broken into 20 sub blocks with each block showing one of the 20 columns of the OSD335x. The other is broken into 12 sub blocks, each grouping signals according to functionalities that the OSD335x provides. So, you can use which ever one fits your needs. Both are linked below.
An Eagle Schematic library containing an Eagle CAD symbol of OSD3358 is also available for download and can be found here.
The following table shows the minimum set of signals that need to be connected to use OSD335x. It also shows internal pull up resistor values, the voltage rail they are pulled up to and the specific pad that was pulled up.
|OSD335x Pad Name||PAD||OSD335x PAD Name||PAD||Pull Up Resistor Value||Pull Up Voltage||Pull Up on PAD|
These power pins are driven by the TPS65217C PMIC and are used internally to power the AM335x, DDR and other components. These pins are all connected within the SiP and do not be connected externally. Optionally, these pins can be brought out as test points for debugging purposes only. They should NEVER be used to power external components.
The OSD335x supports all the frequencies supported by corresponding AM335x present inside. For example, the AM3358 inside the OSD3358 supports 6 Operational Performance Points(OPP). It can run at 300MHz, 600MHz, 720MHz, 800Mhz and 1GHz. These operational performance points are set using the Digital Phase Locked Loops(DPLLs) and MPU, CORE voltages on the AM335x. The following figure from the AM335x datasheet (Table 5-7) shows the OPPs, the corresponding MPU voltage to be set and the frequency of operation of the OPP (Source: AM335x datasheet).
|VDD_MPU OPP||VDD_MPU||ARM Clock Speed|
|Nitro||1.272 V||1.325 V||1.378 V||1 GHz|
|Turbo||1.210 V||1.260 V||1.326 V||800 MHz|
|OPP120||1.152 V||1.200 V||1.248 V||720 MHz|
|OPP100||1.056 V||1.100 V||1.144 V||600 MHz|
|OPP50||0.912 V||0.950 V||0.988 V||300 MHz|
Pin map of OSD335x corresponds to the pin map of the ZCZ package of the AM335x.
The ball map of the OSD335x was designed to match the ball map of AM335x ZCZ package except for a few changes. The following figure highlights the changes that were made to AM335x ZCZ ball map.
Violet and Grey pins are the only pins that have been moved or functionally changed.
Blue pins (AM335x DDR interface) should be left unconnected.
Green pins (AM335x Power input pins) should be left unconnected or brought out as test points for monitoring.
Orange pins are additional pins added to the package for more functions.
Please refer to the datasheet for their functional description.
The major changes in functionality are listed below. (more…)