DM9302
10/100Mbps Ethernet Fiber/Twisted Pair Media Converter with Local bus
5. PIN DESCRIPTION
I = Input, O = Output, I/O = Input / Output, O/D = Open Drain, P = Power, PD=internal pull-low (approx. 50K ohm)
# = asserted Low
5.1 Processor Bus interface
Pin No.
Pin Name
I/O
Description
Processor Read Command
2
IOR#
I
Default is low active. The polarity can be changed by
setting EEPROM.
3
IRQ
O
Interrupt Request
Default is high active and non-open collector type. Its
polarity and output type can be changed by strap pins
or EEPROM setting.
5,6,7,9,10,12,14,15,
17,18,19,20,21,22,24,25
60
SD0~15
CMD
I/O Processor Data Bus bit 0~15
I
Command Type
Upon the IO transaction,
when CMD is high, SD0~15 reflect the value of DATA port
when CMD is low, SD0~15 reflect the value of INDEX port
Processor Chip Select Command
Default is low active. Its polarity can be changed by
EEPROM setting.
62
63
CS#
I
I
IOW#
Processor Write Command
Default is low active. Its polarity can be changed by
EEPROM setting.
5.2 EEPROM Interfaces
Pin No.
Pin Name
I/O
Description
27
28
EEDIO
EECK
I,/O
EEPROM Data In/Out
O,PD EEPROM Serial Clock
This pin is used as the clock for the EEPROM data transfer.
EEPROM Chip Selection.
29
EECS
O,PD
12
Preliminary datasheet
DM9302-15-DS-P01
July 30, 2009
DAVICOM [ DAVICOM SEMICONDUCTOR, INC. ]
