LAN9215I-MT SMSC, LAN9215I-MT Datasheet - Page 82

• Manufacturer Part Number: LAN9215I-MT
• Description: Ethernet ICs Indust Hi Efficient Single-Chip
• Manufacturer: SMSC
• Type: Single Chip MAC and PHY Controllerr

Specifications of LAN9215I-MT

• Ethernet Connection Type: 10 Base-T, 100 Base-TX
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Product: Ethernet Controllers
• Number Of Transceivers: 1
• Standard Supported: 802.3, 802.3u
• Data Rate: 10 Mbps, 100 Mbps
• Supply Voltage (max): 5 V
• Supply Voltage (min): 3.3 V
• Supply Current (max): 69 mA
• Maximum Operating Temperature: + 85 C
• Package / Case: TQFP-100
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 2.7 (03-15-10)
BITS
3
2
1
0
External PHY Detect (EXT_PHY_DET). This bit reflects the latched value
of the EXT_PHY_DET strap. The EXT_PHY_DET strap is used to indicate
the presence of an external PHY. This strap is latched from the value of the
external MDIO signal upon power-up or hard reset. If MDIO is pulled high a
‘1’ will be seen in this bit. If MDIO is pulled low a ‘0’ will be seen in this bit.
The EXT_PHY_DET strap has no other effect on the internal logic. Its only
function is to give the system designer a mechanism to indicate the
presence of an external PHY to a software application.
External PHY Enable (EXT_PHY_EN). When set to a ‘1’, this bit enables
the external MII port. When cleared, the internal PHY is enabled and the
external MII port is disabled.
Notes:
Soft Reset Timeout (SRST_TO).
internal PHY is not in the operational state (RX_CLK and TX_CLK running), the reset
will not complete and the soft reset operation will timeout and this bit will be set to a
‘1’. The host processor must correct the problem and issue another soft reset.
Soft Reset (SRST). Writing 1 generates a software initiated reset. This reset
generates a full reset of the MAC CSR’s. The SCSR’s (system command
and status registers) are reset except for any NASR bits. Soft reset also
clears any TX or RX errors (TXE/RXE). This bit is self-clearing.
Notes:
This signal does not control multiplexing of the SMI port or the TX_CLK
or RX_CLK signals.
There are restrictions on the use of this bit. Please refer to
"MII Interface - External MII Switching," on page 43
Do not attempt a soft reset unless the internal PHY is fully awake and
operational. After a PHY reset, or when returning from a reduced power
state, the PHY must given adequate time to return to the operational state
before a soft reset can be issued. The internal RX_CLK and TX_CLK
signals must be running for a proper software reset. Please refer to
Section 6.8, "Reset Timing," on page 128
The LAN9215i must always be read at least once after power-up, reset,
or upon return from a power-saving state or write operations will not
function.
DESCRIPTION
If a software reset is attempted when the
DATASHEET
16-bit Non-PCI 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support
for details on PHY reset timing.
82
for details.
Section 3.11,
TYPE
RW
RO
RO
SC
EXT_PHY_D
ET strap pin
Dependant
SMSC LAN9215i
DEFAULT
Datasheet
on
0
0
0