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参数资料
| 型号： | DP83848YB-EVK/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 3/86页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD PHYTER EXTREME TEMP |
| 标准包装： | 1 |
| 主要目的： | 接口，以太网 |
| 已用 IC / 零件： | DP83848YB |
| 已供物品： | 板 |
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10
D
P
83
84
8YB
RX_CLK
O
38
MII RECEIVE CLOCK: Provides the 25 MHz recovered receive
clocks for 100 Mb/s mode and 2.5 MHz for 10 Mb/s mode.
Unused in RMII mode. The device uses the X1 reference clock in-
put as the 50 MHz reference for both transmit and receive.
SNI RECEIVE CLOCK: Provides the 10 MHz recovered receive
clocks for 10 Mb/s SNI mode.
RX_DV
S, O, PD
39
MII RECEIVE DATA VALID: Asserted high to indicate that valid
data is present on the corresponding RXD[3:0]. MII mode by de-
fault with internal pulldown.
RMII Synchronous Receive Data Valid: This signal provides the
RMII Receive Data Valid indication independent of Carrier Sense.
This pin is not used in SNI mode.
RX_ER
S, O, PU
41
MII RECEIVE ERROR: Asserted high synchronously to RX_CLK
to indicate that an invalid symbol has been detected within a re-
ceived packet in 100 Mb/s mode.
RMII RECEIVE ERROR: Assert high synchronously to X1 when-
ever it detects a media error and RXDV is asserted in 100 Mb/s
mode.
This pin is not required to be used by a MAC, in either MII or RMII
mode, since the Phy is required to corrupt data on a receive error.
This pin is not used in SNI mode.
RXD_0
RXD_1
RXD_2
RXD_3
S, O, PD
43
44
45
46
MII RECEIVE DATA: Nibble wide receive data signals driven syn-
chronously to the RX_CLK, 25 MHz for 100 Mb/s mode, 2.5 MHz
for 10 Mb/s mode). RXD[3:0] signals contain valid data when
RX_DV is asserted.
RMII RECEIVE DATA: 2-bits receive data signals, RXD[1:0], driv-
en synchronously to the X1 clock, 50 MHz.
SNI RECEIVE DATA: Receive data signal, RXD_0, driven syn-
chronously to the RX_CLK. RXD_0 contains valid data when CRS
is asserted. RXD[3:1] are not used in this mode.
CRS/CRS_DV
S, O, PU
40
MII CARRIER SENSE: Asserted high to indicate the receive me-
dium is non-idle.
RMII CARRIER SENSE/RECEIVE DATA VALID: This signal
combines the RMII Carrier and Receive Data Valid indications.
For a detailed description of this signal, see the RMII Specifica-
tion.
SNI CARRIER SENSE: Asserted high to indicate the receive me-
dium is non-idle. It is used to frame valid receive data on the
RXD_0 signal.
COL
S, O, PU
42
MII COLLISION DETECT: Asserted high to indicate detection of
a collision condition (simultaneous transmit and receive activity)
in 10 Mb/s and 100 Mb/s Half Duplex Modes.
While in 10BASE-T Half Duplex mode with heartbeat enabled this
pin is also asserted for a duration of approximately 1
s at the end
of transmission to indicate heartbeat (SQE test).
In Full Duplex Mode, for 10 Mb/s or 100 Mb/s operation, this sig-
nal is always logic 0. There is no heartbeat function during 10
Mb/s full duplex operation.
RMII COLLISION DETECT: Per the RMII Specification, no COL
signal is required. The MAC will recover CRS from the CRS_DV
signal and use that along with its TX_EN signal to determine col-
lision.
SNI COLLISION DETECT: Asserted high to indicate detection of
a collision condition (simultaneous transmit and receive activity)
in 10 Mb/s SNI mode.
Signal Name
Type
Pin #
Description
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相关代理商/技术参数 |
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| DP83848YBX/NOPB | 功能描述:以太网 IC RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| DP83849C | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PHYTER? DUAL Commercial Temperature Dual Port 10/100 Mb/s Ethernet Physical Layer Transceiver |
| DP83849C_08 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PHYTER? DUAL Commercial Temperature Dual Port 10/100 Mb/s Ethernet Physical Layer Transceiver |
| DP83849CVS | 功能描述:以太网 IC RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| DP83849CVS | 制造商:Texas Instruments 功能描述:TRANSCEIVER, ENET PHYTER, DUAL, 80TQFP 制造商:Texas Instruments 功能描述:TRANSCEIVER, ENET PHYTER, DUAL, 80TQFP; Data Rate:100Mbps; Ethernet Type:IEEE 802.3u; Supply Voltage Min:3V; Supply Voltage Max:3.6V; Digital IC Case Style:TQFP; No. of Pins:80; Interface Type:MII, RMII, Serial; Operating Temperature;RoHS Compliant: Yes |
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