Datasheet

LPC1311_13_42_43 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 5 — 6 June 2012 51 of 74
NXP Semiconductors
LPC1311/13/42/43
32-bit ARM Cortex-M3 microcontroller
10.3 External clock
[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.
Table 14. Dynamic characteristic: external clock
T
amb
= −40 °C to +85 °C; V
DD
over specified ranges.
[1]
Symbol Parameter Conditions Min Typ
[2]
Max Unit
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
Fig 26. 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