LAN9313 Datasheet, PDF (38/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
Note 3.13 The IS buffer type is valid only during the time specified in Section 14.5.2, "Reset and
Configuration Strap Timing," on page 390 and when in I²C mode.
Table 3.7 Serial Management Pins
BUFFER
PIN
NAME
SYMBOL
TYPE
DESCRIPTION
SPI Slave
Serial Data
Input
67
I²C Slave
Serial Data
Input/Output
(I²C Slave
Mode)
SPI Slave
68
Serial Data
Output
SI
SDA
SO
IS
(PU)
SPI Slave Serial Data Input: In SPI slave mode,
this pin is the SPI serial data input.
IS/OD8
Note: In SMI slave and unmanaged modes, this
pin is unused and pulled-up internally.
I²C Serial Data Input/Output: In I²C slave mode,
this pin is the I²C serial data input/output.
Note: In SMI slave and unmanaged modes, this
pin is unused and pulled-up internally.
O8
SPI Slave Serial Data Output: In I²C slave, SMI
slave, and unmanaged modes, this pin is not used
and is driven low.
SPI Slave
Chip Select
nSCS
69
IS
(PU)
SPI Slave Chip Select: SPI slave mode chip
select input. When low, the LAN9313/LAN9313i
SPI slave is selected for SPI transfers. When high,
the SPI serial data output (SO) is 3-stated. In I²C
slave, SMI slave, and unmanaged modes, this pin
is not used.
SPI Slave
Serial Clock
SCK
IS
(PU)
SPI Slave Serial Clock: In SPI slave mode, this
pin is the SPI clock input.
70
I²C Slave
SCL
Serial Clock
Note: In SMI slave and unmanaged modes, this
pin is unused and pulled-up internally.
IS
I²C Slave Serial Clock: In I²C slave mode, this pin
is the I²C clock input.
Note: In SMI slave and unmanaged modes, this
pin is unused and pulled-up internally.
Note: Refer to Section Chapter 8, "Serial Management," on page 101 for additional information
regarding the serial management configuration and functionality.
Revision 1.2 (04-08-08)
38
DATASHEET
SMSC LAN9313/LAN9313i