Subject: RE: Identify Frame and RRDY transmission. Date: Thu, 14 Dec 2006 14:12:46 -0600 From: <Kevin_Marks@Dell.com> To: <monika.talwar@nsysinc.com>, <t10@t10.org> X-Message-Number: 7440 Formatted message: HTML-formatted message 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 regards Mona nSys http://www.nsysinc.com Accelerating designs +1-510-402-4544 ----------------------------------