ML6652CH Micro Linear, ML6652CH Datasheet - Page 16

• Manufacturer Part Number: ML6652CH
• Description: 10/100Mbps Ethernet Fiber and Copper Media Converter with Auto Negotiation
• Manufacturer: Micro Linear

16
Operating Modes are:
1) Forced 10
2) Forced 100
3) Non-Transparent Half-DUPLEX
In this mode, the twisted pair output is disabled until
signal is detected at both the twisted pair and the fiber
optic inputs. The fiber optic output is not disabled, and it
shows the input signal from the twisted pair interface
converted to the equivalent fiber optic technology.
When the TP link partner negotiates the link through the
Auto-Negotiation protocol and FLP bursts reach the
ML6652 operating in the Non-Transparent mode, the
ML6652 will start generating its own FLP Bursts
advertising the speed detected at the FO input and the
DUPLEX mode selected through the DUPLEX pin or
through the management interface bits 30.15 and 30.10
The ML6652 will transmit FLP Bursts as long as it receives
FLP Bursts from the TP link partner. (The decision that the
link is settled will be made by the TP link partner.)
Note 1: In Non-Transparent Half Duplex Mode, only the
Half Duplex mode of operation is advertised through the
Auto Negotiation protocol. However nothing changes
inside the ML6652, the transmit and receive paths are
OPERATING MODES
0 (zero) Volt input on SPEED (or the equivalent Reg.
30 settings) enables only FORCED 10Mbps operation.
100Mbps and Auto-Negotiation are disabled. Link
Integrity Warning (LIW) can also be enabled.
VCC input on SPEED (or the equivalent Reg. 30
settings) enables FORCED 100Mbps operation only.
10Mbps and Auto-Negotiation are disabled. Link
Integrity Warning (LIW) can also be enabled.
VCC/2 (input floating) input on SPEED (or the
equivalent Reg. 30 settings) enables Transparent or
non-transparent 10Mbps and 100Mbps operation.
DUPLEX input (0 Volts at power up) or management
register 30 select NON-TRANSPARENT Mode of
operation and force Half-DUPLEX. Non-transparent
mode was designed for networks that have Auto-
Negotiation capabilities only on the copper side. The
ML6652 operates in Non-Transparent Mode when all
of the following four conditions are met:
a)
b)
c)
d)
equivalent Reg. 30 settings) AND
AND
capable AND
by SPEED input at VCC/2 or by bits in
management register 30.
Duplex input is a VCC or a 0 Volts (or the
Twisted Pair Link is Auto-Negotiation capable
Fiber Optic Link Partner is not Auto-Negotiation
Both 10Mbps and 100Mbps operation are enabled
Preliminary Datasheet
January 2002
completely separate and are always capable of
simultaneous or full duplex use.
Note 2: SPEED and DUPLEX modes are the only abilities
advertised in this mode by the ML6652
Note 3: Link Integrity Warning (LIW) can not be enabled
in this mode.
4) Non-Transparent
In this mode, the twisted pair output is disabled until
signal is detected at both the twisted pair and the fiber
optic inputs. The fiber optic output is not disabled, and it
shows the input signal from the twisted pair interface
converted to the equivalent fiber optic technology.
When the TP link partner negotiates the link through the
Auto-Negotiation protocol and FLP bursts reach the
ML6652 operating in the Non-Transparent mode, the
ML6652 will start generating its own FLP Bursts
advertising the speed detected at the FO input and the
DUPLEX mode selected through the DUPLEX pin or
through the management interface bits 30.15 and 30.10
The ML6652 will transmit FLP Bursts as long as it receives
FLP Bursts from the TP link partner. (The decision that the
link is settled will be made by the TP link partner.)
Note 1: SPEED and DUPLEX modes are the only abilities
advertises in this mode by the ML6652
Note 2: Link Integrity Warning (LIW) can not be enabled
in this mode.
5) Transparent
VCC/2 (input floating) input on SPEED (or the
equivalent Reg. 30 settings) enables Transparent or
non-transparent 10Mbps and 100Mbps operation.
DUPLEX input (VCC at power up) or management
register 30 select NON-TRANSPARENT Mode of
operation. Non-transparent mode was designed for
networks that have Auto-Negotiation capabilities only
on the copper side. The ML6652 operates in Non-
Transparent Mode when all of the following four
conditions are met:
a)
b)
c)
d)
VCC/2 (input floating) input on SPEED (or the
equivalent Reg. 30 settings) enables Transparent or
non-transparent 10Mbps and 100Mbps operation.
DUPLEX input and management register 30 select
equivalent Reg. 30 settings) AND
AND
capable AND
by SPEED input at VCC/2 or by bits in
management register 30.
Duplex input is a VCC or a 0 Volts (or the
Twisted Pair Link is Auto-Negotiation capable
Fiber Optic Link Partner is not Auto-Negotiation
Both 10Mbps and 100Mbps operation are enabled
ML6652