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Unibrain Fire-i 530/630/830 Operation Manual Page 46
4.8. Time Stamp Register
The Time stamp register may be inquired from the Native FireWire Bus (IEEE-1394.a) CYCLE_TIME registers as
follows. You may also get the same value from user defined registers but we recommend this.
Address Description( bit : msb*) Read/Write
0xF0000200 CYCLE_TIME
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
31
SECONDS COUNT CYCLE COUNT CYCLE OFFSET
Bit Number Bit Name Function DIR Description
0 - 6
7 - 19
20 - 31
SECONDS COUNT
CYCLE COUNT
CYCLE OFFSET
Seconds Coun t
Cycle Count
Cycle Offset
R/W
R/W
R/W
1 Hz cycle timer counte r
8,000 Hz c ycle timer counte r
24.576 MHz c ycle timer counte r
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