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| 型號： | LPC2470 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Flashless 16-bit/32-bit micro; Ethernet, CAN, LCD, USB 2.0 device/host/OTG, external memory interface |
| 中文描述： | 毛邊16-bit/32-bit微，以太網(wǎng)，CAN，液晶顯示器，USB 2.0設(shè)備/主機/ OTG功能，外部存儲器接口 |
| 文件頁數(shù)： | 55/72頁 |
| 文件大?。?/td> | 365K |
| 代理商： | LPC2470 |
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LPC2470_0
NXP B.V. 2007. All rights reserved.
Preliminary data sheet
Rev. 00.01 — 5 October 2007
55 of 72
NXP Semiconductors
LPC2470
Fast communication chip
10. Dynamic characteristics
[1]
Characterized but not implemented as production test. Guaranteed by design.
[1]
Parameters are valid over operating temperature range unless otherwise specified.
[2]
Typical ratings are not guaranteed. The values listed are at room temperature (25
°
C), nominal supply voltages.
[3]
Bus capacitance C
b
in pF, from 10 pF to 400 pF.
Table 9.
C
L
= 50 pF; R
pu
= 1.5 k
Ω
on D+ to V
DD(3V3)
,unless otherwise specified.
Symbol
Parameter
t
r
rise time
t
f
fall time
t
FRFM
differential rise and fall time
matching
V
CRS
output signal crossover voltage
t
FEOPT
source SE0 interval of EOP
t
FDEOP
source jitter for differential transition
to SE0 transition
t
JR1
receiver jitter to next transition
t
JR2
receiver jitter for paired transitions
t
EOPR1
EOP width at receiver
Dynamic characteristics of USB pins (full-speed)
Conditions
10 % to 90 %
10 % to 90 %
t
r
/ t
f
Min
8.5
7.7
-
Typ
-
-
-
Max
13.8
13.7
109
Unit
ns
ns
%
1.3
160
2
-
-
-
2.0
175
+5
V
ns
ns
see
Figure 8
see
Figure 8
18.5
9
-
-
-
+18.5
+9
-
ns
ns
ns
10 % to 90 %
must reject as
EOP; see
Figure 8
must accept as
EOP; see
Figure 8
[1]
40
t
EOPR2
EOP width at receiver
[1]
82
-
-
ns
Table 10.
T
amb
=
40
°
C to +85
°
C for commercial applications; V
DD(3V3)
over specified ranges.
[1]
Symbol
Parameter
External clock
f
osc
oscillator frequency
T
cy(clk)
clock cycle time
t
CHCX
clock HIGH time
t
CLCX
clock LOW time
t
CLCH
clock rise time
t
CHCL
clock fall time
I
2
C-bus pins (P0[27] and P0[28])
t
f(o)
output fall time
SSP interface
t
su(SPI_MISO)
SPI_MISO set-up time
Dynamic characteristics
Conditions
Min
Typ
[2]
Max
Unit
1
42
T
cy(clk)
×
0.4
T
cy(clk)
×
0.4
-
-
-
-
-
-
-
-
24
1000
-
-
5
5
MHz
ns
ns
ns
ns
ns
V
IH
to V
IL
20 + 0.1
×
C
b
[3]
-
-
ns
T
amb
= 25
°
C;
measured in
SPI Master
mode; see
Figure 9
-
11
-
ns
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