Datasheet

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DP83849C
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.
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
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