dp83846a National Semiconductor Corporation, dp83846a Datasheet - Page 56

• Manufacturer Part Number: dp83846a
• Description: Dsphyter ? Single 10/100 Ethernet Transceiver
• Manufacturer: National Semiconductor Corporation

6.6 Reset Timing
Note: Software Reset should be initiated no sooner then 500 s after power-up or the deassertion of hardware reset.
Note: It is important to choose pull-up and/or pull-down resistors for each of the hardware configuration pins that provide
fast RC time constants in order to latch-in the proper value prior to the pin transitioning to an output driver.
T6.1.1
T6.1.2
T6.1.3
T6.1.4
Dual Function Pins
Become Enabled As Outputs
Parameter
Latch-In of Hardware
Configuration Pins
HARDWARE
RSTN
Post RESET Stabilization time
prior to MDC preamble for reg-
ister accesses
Hardware Configuration Latch-
in Time from the Deassertion of
RESET (either soft or hard)
Hardware Configuration pins
transition to output drivers
RESET pulse width
MDC
V
CC
Description
T6.1.4
MDIO is pulled high for 32-bit serial man-
agement initialization
Hardware Configuration Pins are de-
scribed in the Pin Description section
56
T6.1.2
T6.1.1
Notes
T6.1.3
INPUT
OUTPUT
Min
160
32 CLOCKS
Typ
3.5
3
3
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Max
Units
s
s
s
s