dp83630sqx National Semiconductor Corporation, dp83630sqx Datasheet - Page 105

• Manufacturer Part Number: dp83630sqx
• Description: Precision Phyter - Ieee 1588 Precision Time Protocol Transceiver
• Manufacturer: National Semiconductor Corporation

T2.2.1
T2.2.2
T2.2.3
T2.2.4
Parameter
18.2.2 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.
Post RESET Stabilization time prior to
MDC preamble for register 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
Description
MDIO is pulled high for 32-bit serial
management initialization
Hardware Configuration Pins are
described in the Pin Description
section
X1 Clock must be stable for at min.
of 1 µs during RESET pulse low
time.
105
Notes
Min
1
Typ
50
3
3
Max
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Units
µs
µs
ns
µs