PHY timer and radio timer in AIF2

I forgot to add the following information in previous post:

I need all this for implementing CPRI Interface between REC and RE.

Vivek,

The PHYT is primarily used as a reference timer for link-based event generation. It is used to control internal timing offsets such as TM delta, RM Pi, PE1 event and PE2 event. Information for all of these offsets can be found in section 4.5 of the AIF2 user's guide.

RADT, on the other hand, is used by the antenna timer to generate events based off of symbol and frame boundaries, depending on the type of protocol implemented (radio standard event generation as opposed to link-based event generation). Relevant terminal counts can be programmed for the PD and PE. Please refer to section 4.4 of the user's guide.

Keep in mind that both timers must be armed by software and can receive start sync pulses from multiple sources. Since you are using CPRI, the timers are going to run in units of the dual-byte clock of 245.76 MHz.

For your specific questions:

1. The difference between the counters for the AT, PE and PD are explicitly mentioned in section 7.8.3.2.3 of the user’s guide.
2. The values provided to them are protocol and application specific. Please refer to the MCDSK and user’s guide for example timing.

If you have a specific question for one of these timers that you cannot find in the documentation, then I suggest you to post the relevant question in the forum. In addition, I recommend you follow the online training found here:

http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=OLT110027

It describes the interoperability of the PHYT and RADT to various modules within AIF2.

Regards,

Sahil Hingorani

Hi Sahil,

Can you sort out my query here

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/403549/1432805#1432805

Thanks in advance,

Rouge