dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 69

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

Bit
7:4
3:0
15
14
13
12
11
10
9
8
14.2.10 Energy Detect Control (EDCR)
This register provides control and status for the Energy Detect function.
ED_DATA_COUNT
ED_AUTO_DOWN
ED_PWR_STATE
ED_ERR_COUNT
ED_BURST_DIS
ED_DATA_MET
ED_ERR_MET
ED_AUTO_UP
Bit Name
ED_MAN
ED_EN
TABLE 36. Energy Detect Control (EDCR), address 0x1D
0, RO/COR
0, RO/COR
0, RW/SC
0001, RW
0001, RW
Default
0, RW
1, RW
1, RW
0, RW
0, RO
Energy Detect Enable:
Allow Energy Detect Mode.
Energy Detect Automatic Power Up:
Automatically begin power up sequence when Energy Detect Data
Threshold value (EDCR[3:0]) is reached. Alternatively, the device could
be powered up manually using the ED_MAN bit (ECDR[12]).
Energy Detect Automatic Power Down:
Automatically begin power down sequence when no energy is detected.
Alternatively, the device could be powered down using the ED_MAN bit
(EDCR[12]).
Energy Detect Manual Power Up/Down:
Begin power up/down sequence when this bit is asserted. When set,
the Energy Detect algorithm will initiate a change of Energy Detect state
regardless of threshold (error or data) and timer values. In managed
applications, this bit can be set after clearing the Energy Detect interrupt
to control the timing of changing the power state.
Energy Detect Burst Disable:
Disable bursting of energy detect data pulses. By default, Energy Detect
(ED) transmits a burst of 4 ED data pulses each time the CD is powered
up. When bursting is disabled, only a single ED data pulse will be sent
each time the CD is powered up.
Energy Detect Power State:
Indicates current Energy Detect Power state. When set, Energy Detect
is in the powered up state. When cleared, Energy Detect is in the
powered down state. This bit is invalid when Energy Detect is not
enabled.
Energy Detect Error Threshold Met:
No action is automatically taken upon receipt of error events. This bit is
informational only and would be cleared on a read.
Energy Detect Data Threshold Met:
The number of data events that occurred met or surpassed the Energy
Detect Data Threshold. This bit is cleared on a read.
Energy Detect Error Threshold:
Threshold to determine the number of energy detect error events that
should cause the device to take action. Intended to allow averaging of
noise that may be on the line. Counter will reset after approximately 2
seconds without any energy detect data events.
Energy Detect Data Threshold:
Threshold to determine the number of energy detect events that should
cause the device to take actions. Intended to allow averaging of noise
that may be on the line. Counter will reset after approximately 2 seconds
without any energy detect data events.
69
Description
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