82595TX Datasheet, PDF (10/59 Pages) Intel Corporation – ISA/PCMCIA HIGH INTEGRATION ETHERNET CONTROLLER

82595TX
2 3 Local Memory Interface (Continued)
Symbol
Pin
No
Type
Name and Function
MDATA0
MDATA1
MDATA2
MDATA3
120 I O LOCAL DATA BUS (MDATA0 – MDATA3) The four I O signals
121
comprising the local data bus are used to read or write data to
122
or from the 4-bit wide DRAM These signals also provide the
123
lower 4 bits of data for accesses to an 8-bit FLASH EPROM or
IA PROM if these components are used A 3 3K pull-up resistor
connects to MDATA3 and enables EEPROM port 2
RAS
9 O This active low output is the Row Address Strobe signal to the
DRAM
CAS
6 O This active low output is the Column Address Strobe signal to
the DRAM
LWE
1 O This active low output is the Write Enable to the DRAM
FADDR14
FADDR15
FADDR16
FADDR17
FADDR18
FADDR19
126 O FLASH ADDRESS 14 – 17 These pins control the FLASH
127
addressing from 16K to 1M to allow paging of the FLASH in 16K
128
spaces These addresses are under direct control of the FLASH
129
PAGING configuration register
6
NOTE ISA Bus I F Only
31
FOE
130 O This output provides the active low Output Enable control to
the FLASH
FWE
1 O This output provides the active low Write Enable control to the
FLASH
BOOTCS
141 O BOOT EPROM FLASH CS
IAPROMCS
143 O IA PROM CS
FL IADATA4
FL IADATA5
FL IADATA6
FL IADATA7
132 I O Provides the upper 4 bits of an 8 bit data path for both the Boot
133
EPROM FLASH and IA PROM for CPU accesses A 3 3K pull-
134
down resistor connected to FL IADATA4 and a 3 3K pull-up
135
resistor connected to FL IADATA7 enables AUTOFLASH Boot
EPROM detect
EEPROMCS
139 I O EEPROM CS Active high signal If no EEPROM is connected
this pin should be connected to V_CC In this case it will function
as an input to the 82595TX to indicate no EEPROM is
connected
EEPROMSK
O EEPROM SHIFT CLOCK This output is used to shift data into
Port 1 (EEPROM1SK) 120
and out of the serial EEPROM
Port 2 (EEPROM2SK) 105
NOTE Port 2 must be used for Plug N’ Play
EEPROMDO
I
EEPROM DATA OUT
Port 1 (EEPROM1DO) 121
Port 2 (EEPROM2DO) 107
NOTE Port 2 must be used for Plug N’ Play
EEPROMDI
O EEPROM DATA IN
Port 1 (EEPROM1DI) 122
Port 2 (EEPROM1DI) 106
NOTE Port 2 must be used for Plug N’ Play
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