[Rashesh]

Can somebody explain me the details of the following signals?
1. HBUSREQM (Output from Bridge), but goes to whom?
2. HGRANTM (Input to Bridge), comes from whom?
3. HMASTLOCKS (Input to Bridge), comes from whom?
4. HSELS (Input to Bridge), comes from whom?
Please let me know these details.

This post has been edited by Rashesh: 02 March 2012 - 11:43 AM

[JD]

From your posting it is almost certain that you are looking at a specific implementation of an AHB2AHB bridge, so as such you really should send your questions about that component to the component provider, rather than an open Forum such as this where we might not have access to the same bridge you are looking at.

However just referring to the standard AHB protocol...

1. HBUSREQ(M) - if this is an output from the bridge, the bridge is the master on the M interface, and masters send their bus request to the AHB Arbiter.

2. HGRANT(M) - as above, if this is an input, the bridge is the master on the M interface, and masters receive the bus grant signal from the AHB Arbiter.

3. HMASTLOCK(S) - following the same arguments, HMASTLOCK as an input makes the S interface a slave, and the slave HMASTLOCK input is driven from the AHB arbiter.

4. HSEL(S) - again an input, meaning this is the slave connected to the bus, and the slave HSEL input is an output from the AHB decoder.

I would recommend having a read through the AHB spec to understand where these signals are used and what they indicate.

Regards,

JD