LPC1774 NXP [NXP Semiconductors], LPC1774 Datasheet - Page 93
LPC1774
Manufacturer Part Number
LPC1774
Description
32-bit ARM Cortex-M3 microcontroller; up to 512 kB flash and 96 kB SRAM; USB Device/Host/OTG
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.LPC1774.pdf
(117 pages)
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NXP Semiconductors
LPC178X_7X
Objective data sheet
Fig 27. Differential data-to-EOP transition skew and EOP width
t
PERIOD
differential
data lines
11.10 Ethernet
Remark: The Ethernet block is available on parts LPC1788/86 and LPC1778/76.
Table 26.
T
[1]
[2]
Symbol Parameter
RMII mode
f
d
t
t
MII mode
f
d
t
t
f
d
t
t
clk
su
h
clk
su
h
clk
su
h
amb
clk
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
n × t
differential data to
clock frequency
clock duty cycle
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
crossover point
SE0/EOP skew
Dynamic characteristics: Ethernet
C to 85
PERIOD
All information provided in this document is subject to legal disclaimers.
+ t
FDEOP
C, V
DD(REG)(3V3)
Rev. 2 — 27 May 2011
Conditions
for ENET_RX_CLK
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
= 3.0 V to 3.6 V. Values guaranteed by design.
crossover point
extended
32-bit ARM Cortex-M3 microcontroller
source EOP width: t
receiver EOP width: t
[1]
[1]
[1][2]
[1][2]
[1]
[1]
[1][2]
[1][2]
[1]
[1]
[1][2]
[1][2]
LPC178x/7x
Min
-
50
4
2
-
50
4
2
-
50
4
2
© NXP B.V. 2011. All rights reserved.
FEOPT
002aab561
EOPR1
Max
50
50
-
-
25
50
-
-
25
50
-
-
, t
EOPR2
93 of 117
Unit
MHz
%
ns
ns
MHz
%
ns
ns
MHz
%
ns
ns