LPC1857_53 NXP Semiconductors, LPC1857_53 Datasheet - Page 109

• Manufacturer Part Number: LPC1857_53
• Description: The LPC1857/53 are ARM Cortex-M3 based microcontrollers for embedded applications
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC1857_53
Objective data sheet
Table 20.
T
[1]
[2]
Symbol Parameter
t
t
MII mode
f

t
t
f

t
t
su
h
clk
su
h
clk
su
h
amb
Fig 30. Ethernet timing
clk
clk
Output drivers can drive a load  25 pF accommodating over 12 inch of PCB trace and the input
capacitance of the receiving device.
Timing values are given from the point at which the clock signal waveform crosses 1.4 V to the valid input or
output level.
=

40
set-up time
hold time
clock frequency
clock duty cycle
set-up time
hold time
clock frequency
clock duty cycle
set-up time
hold time

Dynamic characteristics: Ethernet
C to 85
ENET_RX_CLK
ENET_TX_CLK
ENET_RX_DV
ENET_RX_ER
ENET_RXD[n]
ENET_TX_EN
ENET_TX_ER
ENET_TXD[n]
All information provided in this document is subject to legal disclaimers.

C, V
Rev. 1 — 14 December 2011
DD(REG)(3V3)
Conditions
for ENET_TXDn, ENET_TX_EN,
ENET_RXDn, ENET_RX_ER,
ENET_RX_DV
for ENET_TXDn, ENET_TX_EN,
ENET_RXDn, ENET_RX_ER,
ENET_RX_DV
for ENET_TX_CLK
for ENET_TXDn, ENET_TX_EN,
ENET_TX_ER
for ENET_TXDn, ENET_TX_EN,
ENET_TX_ER
for ENET_RX_CLK
for ENET_RXDn, ENET_RX_ER,
ENET_RX_DV
for ENET_RXDn, ENET_RX_ER,
ENET_RX_DV
= <tbd>.
32-bit ARM Cortex-M3 microcontroller
t
su
t
h
[1][2]
[1][2]
[1]
[1]
[1][2]
[1][2]
[1]
[1]
[1][2]
[1][2]
LPC1857/53
Min
<tbd>
<tbd>
-
<tbd>
<tbd>
<tbd>
-
<tbd>
<tbd>
<tbd>
002aag210
© NXP B.V. 2011. All rights reserved.
Max
-
-
<tbd>
<tbd>
-
-
<tbd>
<tbd>
-
-
109 of 131
Unit
ns
ns
MHz
%
ns
ns
MHz
%
ns
ns