DP83848C_07 datasheet(36/82 Pages) NSC

Part #	DP83848C

Description	PHYTER짰 - Commercial Temperature Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver

PDF	82 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

Logo

36 / 82 page

www.national.com

6.0 Reset Operation

The DP83848C includes an internal power-on reset (POR)

function and does not need to be explicitly reset for normal

operation after power up. If required during normal opera-

tion, the device can be reset by a hardware or software

reset.

6.1 Hardware Reset

A hardware reset is accomplished by applying a low pulse

(TTL level), with a duration of at least 1

µs, to the

RESET_N. This will reset the device such that all registers

will be reinitialized to default values and the hardware con-

figuration values will be re-latched into the device (similar

to the power-up/reset operation).

6.2 Software Reset

A software reset is accomplished by setting the reset bit

(bit 15) of the Basic Mode Control Register (BMCR). The

period from the point in time when the reset bit is set to the

point in time when software reset has concluded is approx-

imately 1

µs.

The software reset will reset the device such that all regis-

ters will be reset to default values and the hardware config-

uration values will be maintained. Software driver code

must wait 3

µs following a software reset before allowing

further serial MII operations with the DP83848C.

DP83848C Datasheet(PDF) 36 Page - National Semiconductor (TI)