參數(shù)資料
型號(hào): MB86960APF-G
元件分類: 微控制器/微處理器
英文描述: 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP100
封裝: PLASTIC, QFP-100
文件頁(yè)數(shù): 64/66頁(yè)
文件大小: 376K
代理商: MB86960APF-G
MB86960
7
PIN DESCRIPTIONS
The following eight pins are provided for optional
connection to an external encoder/decoder. They can also
be used for test purposes, but are not used in a typical
network interface application. Special encoder/decoder
modes are selected by setting DLCR7<7:6>. Refer to the
MEDIUM CONNECTION section under SYSTEM
CONFIGURATION for a complete description of these
modes.
Controller — Encoder/Decoder Interface Pins
SYMBOL
TYPE
DESCRIPTION
TXD
B
TRANSMIT DATA: NRZ transmit serial data. Normally not used. In “Encoder/Decoder Bypass”
mode and “NICE + Monitor” mode, an output which can be fed to an external encoder. In
“Encoder/Decoder Test” mode, an input to the on-chip encoder.
TCK
B
TRANSMIT DATA CLOCK: Clock synchronous with TXD serial data. Normally not used. In
“Encoder/Decoder Bypass” mode, a 10 MHz data clock input used by the controller to synchronize
the TXD data signal. In “NICE + Monitor” mode and “Encoder/Decoder Test” mode, an output from the
on-chip encoder.
TEN
B
TRANSMIT ENABLE: Normally not used. In “NICE + Monitor” mode and “Encoder/Decoder
Bypass” mode, this pin is an output which can be used to control an external encoder. When asserted
high, TEN enables the encoding of the transmitted data. In “Encoder/Decoder Test” mode, an input to
the on-chip encoder.
COL
B
COLLISION PRESENCE: Normally not used. In “Encoder/Decoder Bypass” mode, an active
low input which indicates that the collision inputs COL are active, signifying that the transceiver has
detected a collision on the media. In “NICE + Monitor” mode and “Encoder/Decoder Test” mode, this
is an output from the on-chip encoder/decoder section. COL is a normally high input which changes
to a 10 MHz pulse stream during collision detection.
LBC
B
LOOPBACK CONTROL: Normally not used. In “Encoder/Decoder Bypass” mode and “NICE +
Monitor” mode, this output should be connected to the loopback control pin of the external
encoder/decoder. When this output is asserted high, the external encoder/decoder is placed in
loopback mode. TEN enables the encoding of the transmitted data. In “Encoder/Decoder Test”
mode, this is an input with the same function.
RXD
B
RECEIVE SERIAL DATA: Normally not used. In “Encoder/Decoder Bypass” mode, “NICE +
Monitor” mode and “Encoder/Decoder Test” mode, an NRZ serial bit stream from a decoder or
demodulator to the data link controller.
RCK
B
RECEIVE DATA CLOCK: Normally not used. In “Encoder/Decoder Bypass” mode, “NICE +
Monitor” mode and “Encoder/Decoder Test” mode, this pin is an input for the serial data clock
as recovered by the external decoder or demodulator.
CRS
B
CARRIER SENSE: Normally not used. In “Encoder/Decoder Bypass” mode, an input indicating the
presence of incoming data on the network. In “NICE + Monitor” mode and “Encoder/Decoder Test”
mode, an output from the on-chip encoder/decoder. Assertion of this active high input indicates that a
carrier has been sensed at the RXDATA inputs.
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