RESET LOGIC

The pins and bits involved in the different reset mechanisms are:

RESET -

Input Pin

POR - Internal circuit activated by Power On

nMRESET - Output pin to reset modem

SRESET - Soft Reset bit in ECOR and MCOR,

one SRESET bit for each function.

SOFT RST - EPH Soft Reset bit in RCR

 

Table 5 - Reset Functions

 

 

 

 

 

 

 

 

RESETS THE

 

SAMPLES

TRIGGERS

 

ACTIVATES

ISA VS.

EEPROM

 

FOLLOWING

PCMCIA

READ

 

FUNCTIONS

 

MODE

 

 

 

 

 

 

RESET Pin

All internal logic

nMRESET

Yes

Yes

 

 

 

 

 

POR Circuit

Generates an internal reset of at least 15 msec, with same effect as the RESET pin

 

 

 

 

 

ECOR

The Ethernet controller

 

No

No

Register

function and Ethernet

 

 

 

SRESET Bit

PCMCIA Configuration

 

 

 

 

Registers except for the bit

 

 

 

 

itself

 

 

 

 

 

 

 

 

MCOR

The Modem controller

 

No

No

Register

function and Modem

 

 

 

SRESET Bit

PCMCIA Configuration

 

 

 

 

Registers except for the bit

 

 

 

 

itself

 

 

 

 

 

 

 

 

SOFT RST

The Ethernet Controller

 

No

No

 

itself except for the IA,

 

 

 

 

CONF, and BASE registers.

 

 

 

 

It does not reset any

 

 

 

 

PCMCIA Configuration

 

 

 

 

Register.

 

 

 

 

 

 

 

 

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SMC Networks SMC91C95 manual Reset Logic, Reset Functions, Ecor, Mcor, Soft RST