Fujitsu MBA3147RC Manuel D’Utilisation

 

C141-C013 

77 

b)  DONE (CREDIT TIMEOUT) specifies that the transmitter still has SSP 

frames to transmit but did not receive an RRDY granting frame credit within 
1 ms, or the transmitter has received a CREDIT_BLOCKED and has 
consumed all RRDYs received; and  

c)  DONE (ACK/NAK TIMEOUT) specifies that the transmitter transmitted an 

SSP frame but did not receive the corresponding ACK or NAK within 1 ms. 
As a result, the ACK/NAK count is not balanced and the transmitter is going 
to transmit a BREAK in 1 ms unless the recipient replies with DONE and the 
connection is closed.  

If the transmitter has no more SSP frames to transmit and receives a 
CREDIT_BLOCKED, it may transmit either DONE (NORMAL) or DONE 
(CREDIT TIMEOUT).  

After transmitting DONE, the transmitting phy initializes and starts a 1 ms DONE 
Timeout timer.  

After transmitting DONE, the transmitting phy shall not transmit any more SSP 
frames during this connection. However, the phy may transmit ACK, NAK, 
RRDY, and CREDIT_BLOCKED as needed after transmitting DONE if the other 
phy is still transmitting SSP frames in the reverse direction. Once an SSP phy has 
both transmitted and received DONE, it shall close the connection by transmitting 
CLOSE (NORMAL).  

Figure 1.20 shows the sequence for a closing an SSP connection.