Datasheet

LPC2470 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 4.1 — 16 October 2013 58 of 91
NXP Semiconductors
LPC2470
Flashless 16-bit/32-bit microcontroller
11. Dynamic characteristics
[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 10. Dynamic characteristics
T
amb
= 40 C to +85 C for commercial applications; V
DD(3V3)
over specified ranges.
[1]
Symbol Parameter Conditions Min Typ
[2]
Max Unit
External clock
f
osc
oscillator frequency 1 - 25 MHz
T
cy(clk)
clock cycle time 40 - 1000 ns
t
CHCX
clock HIGH time T
cy(clk)
 0.4 - - ns
t
CLCX
clock LOW time T
cy(clk)
 0.4 - - ns
t
CLCH
clock rise time - - 5 ns
t
CHCL
clock fall time - - 5 ns
I
2
C-bus pins (P0[27]/SDA0 and P0[28]/SCL0)
t
f(o)
output fall time V
IH
to V
IL
20 + 0.1  C
b
[3]
--ns
SSP interface
t
su(SPI_MISO)
SPI_MISO set-up time T
amb
= 25 C;
measured in
SPI Master
mode; see
Figure 17
-11-ns
Fig 13. External clock timing (with an amplitude of at least V
i(RMS)
= 200 mV)
t
CHCL
t
CLCX
t
CHCX
T
cy(clk)
t
CLCH
002aaa907