HC4GX15 Datasheet, PDF (446/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–182
Chapter 1: HardCopy IV GX Transceiver Architecture
Functional Modes
Table 1–50 lists the ALTGX megafunction synchronization state machine parameters
when configured in Serial RapidIO mode.
Table 1–50. Synchronization State Machine Parameters in Serial RapidIO Mode
Parameters
Number of valid K28.5 code groups received to achieve synchronization.
Number of errors received to lose synchronization.
Number of continuous good code groups received to reduce the error count by one.
Number
127
3
255
Figure 1–152 shows a conceptual view of the synchronization state machine
implemented in Serial RapidIO functional mode.
Figure 1–152. Synchronization State Machine in Serial RapidIO Mode
Data = !Valid
ecntr = 3
Loss of Sync
Data = Comma
Comma Detect
if Data == Comma
kcntr++
else
kcntr=kcntr
kcntr = 127
Data = valid;
kcntr < 127
Synchronized
Data=Valid
Data = !Valid
Synchronized Error
Detect
if Data == !Valid
ecntr++
gcntr=0
else
if gcntr==255
ecntr--
gcntr=0
else
gcntr++
ecntr = 0
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation