NXP Semiconductors
LPC2212/2214
16/32-bit ARM microcontrollers
9. Dynamic characteristics
Table 9. Dynamic characteristics
Tamb = −40 °C to +85 °C for industrial applications; VDD(1V8), VDD(3V3) over specified ranges.[1]
Symbol
Parameter
Conditions
Min
Typ
External clock
fosc
oscillator frequency supplied by an external
1
-
oscillator (signal generator)
external clock frequency
1
-
supplied by an external
crystal oscillator
external clock frequency if
10
-
on-chip PLL is used
external clock frequency if
10
-
on-chip bootloader is used
for initial code download
Tcy(clk)
clock cycle time
tCHCX
clock HIGH time
tCLCX
clock LOW time
tCLCH
clock rise time
tCHCL
clock fall time
Port pins (except P0[2] and P0[3])
20
-
Tcy(clk) × 0.4 -
Tcy(clk) × 0.4 -
-
-
-
-
tr
rise time
tf
fall time
I2C-bus pins (P0[2] and P0[3])
-
10
-
10
tf
fall time
VIH to VIL
[2] 20 + 0.1 × Cb -
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Bus capacitance Cb in pF, from 10 pF to 400 pF.
Max
Unit
50
MHz
30
MHz
25
MHz
25
MHz
1000
ns
-
ns
-
ns
5
ns
5
ns
-
ns
-
ns
-
ns
LPC2212_2214_4
Product data sheet
Rev. 04 — 3 January 2008
© NXP B.V. 2008. All rights reserved.
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