adm6992c Infineon Technologies Corporation, adm6992c Datasheet - Page 27

• Manufacturer Part Number: adm6992c
• Description: Two Port Bridge Fiber To Fast Ethernet Converter
• Manufacturer: Infineon Technologies Corporation

3.6.3
To write data into desired EEPROM Register, write the address of the EEPROM Register.
EX. <35”1”s><01><01><00000><00100><10><001 0000000 000001 0001000001000000>
Write NINJA C/CX (ADM6992C/CX) Internal EEPROM mapping Reg.1
3.7
The NINJA C/CX (ADM6992C/CX) can be reset either by hardware or software. A hardware reset is accomplished
by applying a negative pulse, with duration of at least 100 ms to the RC pin of the NINJA C/CX (ADM6992C/CX)
during normal operation to guarantee internal SSRAM is reset properly.
Hardware reset operation samples the pins and initializes all registers to their default values. This process includes
re-evaluation of all hardware configurable registers. A hardware reset affects all embedded PHYs in the device.
Software reset can reset all embedded PHY and it does not latch the external pins nor reset the registers to their
respective default values. This can be achieved by writing FF to EEPROM Reg.3F
Logic levels on several I/O pins are detected during a hardware reset to determine the initial functionality of NINJA
C/CX (ADM6992C/CX). Some of these pins are used as output ports after reset operation.
Care must be taken to ensure that the configuration setup will not interfere with normal operations. Dedicated
configuration pins can be tied to VCC or Ground directly. Configuration pins multiplexed with logic level output
functions should be either weakly pulled up or weakly pulled down through external resistors.
3.7.1
To write data into desired EEPROM Register via EEPROM interface.
If external EEPROM 93C46 or 93C66 exists, any WRITE programming instructions after EWEN instruction is
executed can be updated effectively on EEPROM content and NINJA C/CX (ADM6992C/CX) internal mapping
register on the same time.
If no external EEPROM exists, EECS/EECK/EEDI must be kept tristate at least 100ms after hardware reset. Any
WRITE programming instructions after EWEN instruction is executed can be updated effectively on NINJA C/CX
(ADM6992C/CX) internal mapping register. Please notice that NINJA C/CX (ADM6992C/CX) can only identify
93C66-programming instructions if no external EEPROM.
Data Sheet
Write EEPROM Register via SMI Register
Reset Operation
Write EEPROM Register via EEPROM Interface
CMD ADDRESS DATA
27
H
. with value 820f.
H
.
Function Description
Rev. 1.02, 2005-11-25
ADM6992C/CX
Ninja C/CX