Datasheet

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DP83848T
8.2.2 Reset Timing
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.
Vcc
Hardware
RESET_N
MDC
32 clocks
Latch-In of Hardware
Configuration Pins
Dual Function Pins
Become Enabled As Outputs
input output
T2.2.3
T2.2.2
T2.2.1
X1 clock
T2.2.4
Parameter Description Notes Min Typ Max Units
T2.2.1 Post RESET Stabilization time
prior to MDC preamble for reg-
ister accesses
MDIO is pulled high for 32-bit serial man-
agement initialization
3 µs
T2.2.2 Hardware Configuration Latch-
in Time from the Deassertion
of RESET (either soft or hard)
Hardware Configuration Pins are de-
scribed in the Pin Description section
3 µs
T2.2.3 Hardware Configuration pins
transition to output drivers
50 ns
T2.2.4 RESET pulse width X1 Clock must be stable for at min. of 1us
during RESET pulse low time.
1 µs