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參數資料
| 型號： | MC68160BFB |
| 廠商： | MOTOROLA INC |
| 元件分類： | 網絡接口 |
| 英文描述： | ENHANCED ETHERNET INTERFACE TRANSCEIVER |
| 中文描述： | DATACOM, ETHERNET TRANSCEIVER, PQFP52 |
| 封裝： | PLASTIC, LQFP-52 |
| 文件頁數： | 5/30頁 |
| 文件大小： | 372K |
| 代理商： | MC68160BFB |
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MC68160 MC68160B MC68160C
Table 1. Pin Function Description (continued)
5
MOTOROLA ANALOG IC DEVICE DATA
Pin(s)
Symbol
Type
Name/Function
OSCILLATOR AND FREQUENCY MULTIPLIER
12
MFILT
C
Frequency Multiplier Filter Connection Point:
An external resistor capacitor filter must be
attached to this pin.
16
X1
I/C
CMOS
Oscillator Inverter Input and Crystal Connection Point:
When connected for crystal
oscillator operation, the frequency of the clock which appears at TCLK is half that of the
crystal oscillator. As an option, instead of connecting to a crystal, X1 may be driven from an
external 20 MHz CMOS compatible clock generator.
17
X2
O/C
CMOS
Oscillator Inverter Output and Crystal Connection Point:
This pin is used only for the
connection of an external crystal and capacitor. It must be left unconnected if X1 is driven by
an external CMOS Clock generator.
MODE SELECT
3
4
5
CS0
CS1
CS2
I
TTL
Mode Select:
The logic states applied to these pins select the appropriate interface for the
desired IEEE–802.3 controller or enable the standby mode. When the standby mode is
selected, the MC68160, B and C power supply current is greatly reduced. Additionally, in the
standby mode, all of the controller inputs and outputs are driven to the high impedance state.
6
LOOP
I
TTL
Diagnostic Loopback:
Asserting this function causes serial NRZ data at the TX input to be
Manchester encoded and then looped back through the Manchester decoder, appearing at
the RX output. This diagnostic loopback function operates independent of Twisted Pair (TP)
or Access Unit Interface (AUI) port connectivity or activity. Neither the TP port nor the AUI
port transmits data from the controller while diagnostic loopback is selected. Likewise, the
controller interface receives data neither from the TP nor the AUI receivers while in this
mode. The polarity fault detection and link integrity functions are not inhibited by the
diagnostic loopback mode. If otherwise enabled, they continue to function. If the twisted pair
port is selected, and TPSQEL is driven to the low logic state, a collision detect pulse is
delivered following each transmission to simulate the twisted pair SQE test.
9
APORT
I
TTL
Automatic Port Selection Enable:
When high, MC68160, B and C will automatically select
the TP or AUI port based on the presence or absence of valid link beats or frames at the TP
receive input. If the AUI port is automatically selected, the MC68160, B and C will continue to
produce link pulses for the TP port. Changing ports requires approximately 1.0 ms to allow
the circuitry
for the new port to resume normal operation. The power consumption is minimized in the
circuitry associated with the unselected port.
27
TPSQEL
I
TTL
Twisted Pair Signal Quality Error Test Enable:
Forcing this pin low enables testing of the
internal TP collision detect circuitry after each transmit operation to the TP media. This
function provides a simulated collision to as much of the MC68160, B and C collision detect
circuitry as possible without affecting the attached twisted pair channel. A normal SQE test
results in a high logic state at the CLSN controller interface pin which begins 6 to 16–bit
times after the last transition of a transmitted signal and continues for 5 to 15–bit times.
(When the AUI port is selected, SQE test signals are generated by the coaxial cable
transceiver and delivered to the controller via the MC68160, B and C ACX+/– receive inputs)
28
TPFULDL
I
TTL
Twisted Pair Full Duplex Mode Select:
Forcing this pin low allows simultaneous transmit
and receive operation on the twisted pair port without an indicated collision. This pin is not to
be asserted with LOOP as a test mode is enabled that disrupts normal operation.
29
TPAPCE
I
TTL
Twisted Pair Automatic Polarity Correction Enable:
When TPAPCE is high, automatic
polarity correction is enabled, and MC68160, B and C will internally correct for a polarity fault
on the receive circuit. Additionally, when TPAPCE is high, the presence of a polarity fault is
indicated on TPPLR.
46
TPEN
I/O
TTL
(TTL/CMOS)
Twisted Pair Port Enable:
If APORT is low, TPEN is an input which determines whether the
AUI port (TPEN low) or TP port (TPEN high) will be manually selected. If the AUI port is
manually selected, the MC68160, B and C will not produce link pulses for the TP port.
If APORT is high, TPEN is an output which will indicate which port has been automatically
selected by driving TPEN low (for AUI) or high (for TP). In its output mode TPEN can sink
10 mA in the low output state and source 10 mA in the high output state. (See Pin 9
Description.)
Changing ports requires approximately 1.0 ms to allow the circuitry for the new port to
resume normal operation. The power consumption is minimized in the circuitry associated
with the unselected port. In the standby mode, this pin is driven to the high impedance state.
相關PDF資料 |
PDF描述 |
|---|---|
| MC68160 | ENHANCED ETHERNET INTERFACE TRANSCEIVER |
| MC68160B | ENHANCED ETHERNET INTERFACE TRANSCEIVER |
| MC68160C | ENHANCED ETHERNET INTERFACE TRANSCEIVER |
| MC68160CFB | 3.0V 100ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference 3-SOT-23 -40 to 125 |
| MC68160FB | ENHANCED ETHERNET INTERFACE TRANSCEIVER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68160C | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:ENHANCED ETHERNET INTERFACE TRANSCEIVER |
| MC68160CFB | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:ENHANCED ETHERNET INTERFACE TRANSCEIVER |
| MC68160FB | 制造商:Freescale Semiconductor 功能描述: 制造商:Motorola Inc 功能描述: 制造商: 功能描述: 制造商:undefined 功能描述: |
| MC68181 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Advance Information ROAMING FLEX chip SIGNAL PROCESSOR |
| MC68184 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Broadband Interface Controller |
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