AC101LKQT Broadcom, AC101LKQT Datasheet - Page 10

• Manufacturer Part Number: AC101LKQT
• Manufacturer: Broadcom

Specifications of AC101LKQT

• Number Of Receivers: 1
• Data Rate: 10/100Mbps
• Package Type: TQFP
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Lead Free Status / Rohs Status: Not Compliant

AC101L
In 100BASE-FX mode, the external fiber-optic receiver performs the signal energy detection function and communicates this
information directly to the SD signal (PIN 28).
In 10BASE-T mode, a link pulse detection circuit constantly monitors the RXP/RXN pins for the present of valid link pulses.
C
Carrier sense is asserted asynchronously on the CRS pins as soon as activity is detected on the receive data stream. RXDV
is asserted as soon as a valid SSD (Start-of-Stream Delimiter) is detected. Carrier sense and RXDV are de-asserted
synchronously upon detection of a valid end of stream delimiter or two consecutive idle code groups in the receive data
stream. However, if the carrier sense is asserted and a valid SSD is not detected immediately, RXER is asserted instead of
RXDV.
In 10BASE-T mode, CRS is asserted asynchronously when the valid preamble and data activity is detected on the RXIP and
RXIN pins.
In the half-duplex mode, the CRS is activated during data transmit. In the full-duplex mode, the CRS is activated during data
receiving only.
C
In half-duplex mode, collision detect is asserted on the COL pin whenever carrier sense is asserted and transmission is in
progress.
A
Auto-negotiation selection is on 100BASE twisted-pair PHY only; it is not operating in 100BASE fiber PHY.
In 100BASE-TX mode, auto-negotiation can be enabled or disabled by hardware or software control. When the auto-
negotiation function is enabled, the 100BASE-TX PHY automatically chooses its mode of operation by advertising its abilities
and comparing them with those received from its link partner. 100BASE-TX PHY can be configured to advertise 100BASE-
TX full-duplex or 100BASE-TX half-duplex.
The default auto-negotiation mode is configured via reset read value of ANEN/LED3 signal (pin 23) and SPD100/LED1.
Page
0.13
0.12
0.8
4.8/1.14
ARRIER
OLLISION
UTO
2
-N
EGOTIATION
S
Speed Select
ANEN Enable
Duplex
100BASE-TX Full-Duplex
ENSE
D
ETECTION
(CRS)/RXDV
SPD100
0 = Disable Auto-negotiation.
The default value is:
!ANEN && DUPLEX
The default value of this bit is:
SPD100 && DUPLEX
The default value is:
1 = Enable Auto-negotiation.
B roa dcom
Preliminary Data Sheet
Document
AC101L-DS05-R
03/10/03