dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 88

• Manufacturer Part Number: dp83630sqx
• Description: Precision Phyter - Ieee 1588 Precision Time Protocol Transceiver
• Manufacturer: National Semiconductor Corporation

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Bit
15
14
13
12
11
10
14.5.12 PTP Event Data Register (PTP_EDATA), Page 4
This register provides a mechanism for reading the Event Timestamp and extended event status. If present, the extended event
status is read prior to reading the Event Timestamp. Presence of the Extended Event Status field is indicated by the MULT_EVNT
bit in the PTP Event Status Register. The timestamp consists of four 16-bit fields. This register contains a valid timestamp if the
PTP_ESTS register indicates an Event Timestamp is available. Not all fields have to be read for each timestamp. For example, if
the EVNT_TS_LEN indicates the seconds field has not changed from the previous event, software may skip that read. Reading
the PTP_ESTS register will cause the device to move to the next available timestamp.
The fields are read in the following order:
•
•
•
•
•
For Extended Event Status, the following definition is used for the PTP Event Data Register:
9
8
7
6
5
Extended Event Status[15:0] (only available if PTP_ESTS indicates detection of multiple events)
Timestamp_ns [15:0]
Timestamp_ns[29:16] (upper 2 bits are always 0)
Timestamp_sec[15:0]
Timestamp_sec[31:16]
Bit Name
E7_RISE
E6_RISE
E5_RISE
E4_RISE
E3_RISE
E2_RISE
E7_DET
E6_DET
E5_DET
E4_DET
E3_DET
TABLE 61. PTP Event Data Register (PTP_EDATA), address 0x1F
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
0, RO/SC
Default
Rise/Fall edge direction for Event 7:
Indicates direction of Event 7
0 = Fall
1 = Rise
Event 7 detected:
Indicates Event 7 detected a rising or falling edge at the time contained in the
PTP_EDATA register timestamp.
Rise/Fall edge direction for Event 6:
Indicates direction of Event 6
0 = Fall
1 = Rise
Event 6 detected:
Indicates Event 6 detected a rising or falling edge at the time contained in the
PTP_EDATA register timestamp.
Rise/Fall edge direction for Event 5:
Indicates direction of Event 5
0 = Fall
1 = Rise
Event 5 detected:
Indicates Event 5 detected a rising or falling edge at the time contained in the
PTP_EDATA register timestamp.
Rise/Fall edge direction for Event 4:
Indicates direction of Event 4
0 = Fall
1 = Rise
Event 4 detected:
Indicates Event 4 detected a rising or falling edge at the time contained in the
PTP_EDATA register timestamp.
Rise/Fall edge direction for Event 3:
Indicates direction of Event 3
0 = Fall
1 = Rise
Event 3 detected:
Indicates Event 3 detected a rising or falling edge at the time contained in the
PTP_EDATA register timestamp.
Rise/Fall edge direction for Event 2:
Indicates direction of Event 2
0 = Fall
1 = Rise
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Description