Broadcom NetXtreme/NetLink BCM5718 Series

Time Sync RegistersBCM5718 Programmer’s Guide
Broadcom®
January 29, 2016 • 5718-PG108-R Page 166
TX TIME WATCHDOG LSB[1] REG [Offset 0x6920]
TX TIME WATCHDOG MSB[1] REG [Offset 0x6924]
EAV REF-COUNT SNAP-SHOT LSB[1] REG [Offset 0X6930]
This LSB and MSB pair captures the EAV Reference Count when externally triggered by the desired TimeSync/
APE_GPIO pin – a toggle serves a trigger. The only legal sequence of accessing this pair is Read-LSB followed
by Read-MSB.
Watchdog MSB Value 30:0 RW 0x00 This, concatenated with the Watchdog[0] LSB value,
constitutes a 63-bit value. Precision of the value is
1ns – which equates to the precision of the EAV
Reference Count.
If bit[31] ==1, the desired TimeSync/APE_GPIO shall
toggle as soon as EAV Reference Count[62:0]
increments to match this 63-bit value.
Note: Setting this time value back in time will
produce no toggle.
Name Bits Access Default Value Description
Watchdog LSB Value 31:0 RW 0x0000 See TX Time Watchdog MSB[1] Register
Name Bits Access Default Value Description
Enable Lock Timer 31 RW 0 Write a 1 to enable Time Watchdog[0].
Watchdog MSB Value 30:0 RW 0x00 This, concatenated with the Watchdog[0] LSB value,
constitutes a 63-bit value. Precision of the value is
1ns – which equates to the precision of the EAV
Reference Count.
If bit[31] ==1, the desired TimeSync/APE_GPIO shall
toggle as soon as EAV Reference Count[62:0]
increments to match this 63-bit value.
Note: Setting this time value back in time will
produce no toggle.
Name Bits Access Default Value Description
EAV Reference Count
Snap-shot [lower half]
31:0 RO U LSB of the EAV Reference Count as snapshotted by
TimeSync/APE_GPIO [2:0] shall always be 000.
Name Bits Access Default Value Description