7.16.1 Says that if you are going to
accept a connection with OPEN_ACCEPT, then you better be able to provide at
least one RRDY within 1ms or you shall not accept the connection and instead
reply with OPEN_REJECT (RETRY).
State machine takes precedence, however it
is gross timer at that.
Kevin
From: owner-t10@t10.org [mailto:owner-t10@t10.org] On Behalf Of Mona
Sent: Thursday, December 14, 2006
1:51 AM
To: t10@t10.org
Subject: Identify Frame and RRDY
transmission.
Hello all,
I am referring to sas2r07 version.
1)Please see the section 7.16.1 of the specification.
7.16.1 Opening an SSP connection
An SSP phy that accepts an OPEN address frame shall transmit at least one RRDY
in that connection within
1 ms of transmitting an OPEN_ACCEPT. If the SSP phy is not able to grant
credit, it shall respond with
OPEN_REJECT (RETRY) and not accept the connection request.
According to this statement, OPEN_REJECT will be transmitted if RRDY can't b
transmitted after accepting the connection. It means OPEN_REJECT(RETRY) will be
transmitted after OPEN_ACCEPT is transmitted.
But as stated in Table 88, OPEN_REJECT is transmitted when there is no connection. Both the statements are in contrary. 2) The last line of section 7.9.1 Identification and hard reset sequence overview states: (A) "If a phy does not receive a HARD_RESET primitive sequence or a valid IDENTIFY address frame within 1 ms of phy reset sequence completion, it shall restart the phy reset sequence." But 3rd para of section 7.9.4.5.3.1 State description states: (B) "After this state receives an Identify Transmitted message, it shall initialize and start the Receive Identify Timeout timer." Does spec. refer to same timer in both the statements. In case they are same (A) asks to start the timer after phy reset sequence is over while (B) asks to start the timer after transmitting the Identify Frame. There will always be overhead or delays related to Identify frame transmission. Which is the correct implementation. Shall the timer be started after Frame is transmitted or after phy reset sequence is over. Please suggest.Thanks & Best regardsMona nSyshttp://www.nsysinc.comAccelerating designs +1-510-402-4544----------------------------------