Signal Description
Pin Description
Copyright © 2014 Marvell CONFIDENTIAL Doc. No. MV-S107228-00 Rev. --
August 11, 2014, Advance Document Classification: Proprietary Information Page 19
40 40 EE_DOUT
/C3_LED
/P5_LED0
I/O, PU Serial EEPROM data out from a 4-wire EEPROM device
or Serial EEPROM data I/O to/from a 2-wire EEPROM
device and Column 3 for the LEDs. EE_DOUT is serial
EEPROM data referenced to EE_CLK used to receive
(and send if 2-wire EEPROM) the EEPROM (address
1
/)
data (to/) from the external serial EEPROM (if present).
2-wire EEPROMs require that this pin is connected to
EE_VDDO through a 4.7 kohm pull-up resistor.
EE_DOUT is a multi-function pin which is also used to
connect to the anode of LED column 3 for each row, if
used in the multiplexed LED mode (see R[2:0]_LED
above). This same pin can be used to directly drive an
LED in a non-multiplexed fashion (P5_LED0). In this
mode the cathode of the LED connects to this pin through
a series current limiting resistor. The anode of each LED
connects to a power source.
EE_DOUT is internally pulled high via a resistor so the pin
can be left floating when unused.
39 39 EE_CS
/C2_LED
/P4_LED0
/S_SEL
Typically
Output, PD
Serial EEPROM chip select and Column 2 for the LEDs.
EE_CS is the 4-wire serial EEPROM chip select
referenced to EE_CLK. It is used to enable the external
4-wire serial EEPROM (if present), and to delineate each
data transfer. The pin is not used for 2-wire serial
EEPROMs.
EE_CS is a multi-function pin which is also used to
connect to the anode of LED column 2 for each row, if
used in the multiplexed LED mode (see R[2:0]_LED
above). This same pin can be used to directly drive an
LED in a non-multiplexed fashion (P4_LED0). In this
mode the cathode of the LED connects to this pin through
a series current limiting resistor. The anode of each LED
connects to a power source.
It is also used to configure the device after a hardware
reset. After reset is asserted, EE_CS becomes an input
and the S_SEL SERDES configuration information below
is latched 1mSec after the rising edge of RESETn as
follows:
0 = Connect the SERDES to Port 4’s MAC
1 = Connect the SERDES to Port 5’s MAC only if
P5_MODE = 0x6 (else the SERDES is disabled and
powered down)
EE_CS is internally pulled low via a resistor so the pin can
be left floating when unused. Use a 4.7 kohm resistor to
EE_VDDO for a configuration high.
Table 5: Port Status LEDs (Ports 0 to 6) (Continued)
88E6172
Pin #
88E6176
Pin #
Pin Name Pin Type Description