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LPC2157 数据表(PDF) 38 Page - NXP Semiconductors

部件名 LPC2157
功能描述  Single-chip 16-bit/32-bit microcontrollers; 512 kB flash, with 32 segment x 4 LCD driver
PDF  45 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

LPC2157 数据表(HTML) 38 Page - NXP Semiconductors

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LPC2157_2158_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 15 October 2008
38 of 45
NXP Semiconductors
LPC2157/2158
Single-chip 16-bit/32-bit microcontrollers
9.
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 Cb in pF, from 10 pF to 400 pF.
Table 9.
Dynamic characteristics of USB pins (full-speed)
CL = 50 pF; Rpu = 1.5 kΩ on D+ to VDD, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tr
rise time
10 % to 90 %
4
-
20
ns
tf
fall time
10 % to 90 %
4
-
20
ns
tFRFM
differential rise and fall time
matching
(tr/tf)
90
-
110
%
VCRS
output signal crossover voltage
1.3
-
2.0
V
tFEOPT
source SE0 interval of EOP
see Figure 10
160
-
175
ns
tFDEOP
source jitter for differential transition
to SE0 transition
see Figure 10
−2
-
+5
ns
tJR1
receiver jitter to next transition
−18.5
-
+18.5
ns
tJR2
receiver jitter for paired transitions
10 % to 90 %
−9
-
+9
ns
tEOPR1
EOP width at receiver
must reject as
EOP; see
Figure 10
[1] 40
--ns
tEOPR2
EOP width at receiver
must accept as
EOP; see
Figure 10
[1] 82
--ns
Table 10.
Dynamic characteristics
Tamb = −40 °C to +85 °C for commercial applications, VDD over specified ranges[1]
Symbol
Parameter
Conditions
Min
Typ[2]
Max
Unit
External clock
fosc
oscillator frequency
10
-
25
MHz
Tcy(clk)
clock cycle time
40
-
100
ns
tCHCX
clock HIGH time
Tcy(clk) × 0.4
-
-
ns
tCLCX
clock LOW time
Tcy(clk) × 0.4
-
-
ns
tCLCH
clock rise time
-
-
5
ns
tCHCL
clock fall time
-
-
5
ns
Port pins (P0[2], P0[3], P0[11], and P0[14])
tr(o)
output rise time
-
10
-
ns
tf(o)
output fall time
-
10
-
ns
I2C-bus pins (P0[2], P0[3], P0[11], and P0[14])
tf(o)
output fall time
VIH to VIL
20 + 0.1
× Cb[3]
--ns



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