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參數(shù)資料
| 型號： | DM9801A |
| 文件頁數(shù)： | 32/60頁 |
| 文件大?。?/td> | 605K |
| 代理商： | DM9801A |
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DM9801A
1M Home Phoneline Network Physical Layer Single Chip Transceiver
32
Final
Version: DM9801A-DS-F01
May 30, 2001
RX_PCOM Low Register - Register 23
Bit
Bit Name
23.15 –
23.0
Default
0, RW
Description
RX_PCOM_LO
RX_PCOM_LO:
The low order word of the 32-bit receive data field to be used for out-of-
band communications between PHY management entities.
A non-null receive PCOM will set the RX_PCOM_VAL bit in the ISTAT
register.
An access of the high byte of the RX_PCOM_HI register will clear the
RX_PCOM_VAL bit in the ISTAT register.
Peak Noise Register - Register 24
Bit
Bit Name
24.15 -
24.8
Default
0xFF, RW
Description
PEAK_LEVEL
Peak Level:
This is a measurement of the peak level of the last valid (non-collision)
AID received also, the maximum allowable value of the noise
measurement. If NOISE_LEVEL exceeds PEAK_LEVEL,
NOISE_LEVEL is reset to NOISE_FLOOR.
NOISE LEVEL:
This is the digital value of the SLICE_LVL_NOISE output. It is
effectively a measure of the noise level on the wire. When auto-
adaptation is enabled (bit 5 of the Control register is false) this register
is updated with the current noise count every 50n Secs. When
adaptation is disabled, this register can be written and is used to
generate both the SLICE_LVL_NOISE and the SLICE_LVL_DATA
signals.
24.7 -
24.0
NOISE_LEVEL
0x07, RW
Noise Control A Register - Register 25
Bit
Bit Name
25.15 -
25.8
25.7 -
25.0
Default
0xC2, RW
Description
NSE_CEILING
Noise Ceiling:
The maximum value of the NOISE_LEVEL measurement.
Noise Floor:
The minimum value of the NOISE_LEVEL measurement.
NSE_FLOOR
0x07, RW
Noise Control B Register - Register 26
Bit
Bit Name
26.15 -
26.8
Default
0x00, RW
Description
NSE_EVENTS
Noise Events:
An 8 bit counter that records the number of noise events detected.
Overflows are held as 0xFF. This register is cleared by setting bit 6 of
the Control register (CLR_NS_EVNT).
Noise Attack:
Sets the attack characteristics of the noise algorithm. The high nibble
sets the number of noise events needed to raise the NOISE_LEVEL
immediately, while the low nibble is the number of noise events needed
to raise the NOISE_LEVEL at the end of an 870 msec period.
26.7 -
26.0
NSE_ATTACK
0xF4, RW
Aid Address Register - Register 27
Bit
Bit Name
27.15 -
27.2
Default
0, RW
Description
Reserved
Reserved:
These bits will always be read as 0.
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相關代理商/技術參數(shù) |
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| DM9801AE | 制造商:DAVICOM 制造商全稱:DAVICOM 功能描述:1M Home Phoneline Network Physical Layer Single Chip Transceiver |
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| DM9B | 功能描述:數(shù)字萬用表 4000 COUNT AUTO RoHS:否 制造商:Tektronix 產(chǎn)品:Multimeters 類型:Bench 準確性:0.04 % 電壓范圍:2 V to 2 kV 電阻范圍: 電容范圍: 顯示計數(shù): 頻率:10 Hz to 45 Hz, 850 Hz to 1 MHz 測距: 真均方根值: 數(shù)據(jù)保持: |
| D-M9B | 制造商:SMC Corporation of America 功能描述:Sensor, solid state, direct mount, grommet connection, for MX/MH/CQ2/NCQ2/NCQ8 制造商:SMC 功能描述:2-Wire Auto Switch for 24Vdc Relay/PLC |
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