UPD98405 NEC, UPD98405 Datasheet - Page 18

• Manufacturer Part Number: UPD98405
• Description: 155M ATM INTEGRATED SAR CONTROLLER
• Manufacturer: NEC

<3> Serial EEPROM interface signals
<4> Expansion ROM interface signals.
18
E2PCS
E2PDI
E2PDO
E2PCLK
ROMA15-
ROMA0
ROMD7-
ROMD0
ROMCS_B
ROMOE_B
Pin Name
Pin Name
The
EEPROM interface, the contents of the PCI configuration register can be loaded from an EEPROM connected.
The PD98405 has an expansion ROM interface as option.
Remark It is recommended that National Semiconductor’s “NM93C46” be connected as the EEPROM.
PD98405 has a serial EEPROM interface supporting MICROWIRE
200-207,
209-213,
215-217
218-225
Pin No.
Pin No.
234
231
232
233
226
230
I/O
I/O
O
O
O
O
O
O
I
I
I/O Level
I/O Level
Data Sheet S12689EJ2V0DS00
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
This is a chip select signal for EEPROM.
EEPROM data input.
This signal is connected to the data output pin of the EEPROM.
This signal is internally pulled down.
This signal is connected to the data input pin of the EEPROM.
This pin supplies the clock necessary for transferring data with
the EEPROM. It divides the clock input to the CLK pin by 36 for
output.
ROM address.
These are address signals to access the 64K expansion ROM.
ROM data.
These are expansion ROM data signals and are internally pulled
down.
ROM select.
This is a chip select signal for the expansion ROM.
ROM output enable.
This signal enables the output buffer of the expansion ROM
during a read operation.
EEPROM chip select.
EEPROM data output.
EEPROM clock.
TM
Function
Function
interface.
Through this serial
PD98405