Datasheet

LPC2377_78 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6.1 — 16 October 2013 47 of 69
NXP Semiconductors
LPC2377/78
Single-chip 16-bit/32-bit microcontrollers
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 8. 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 (see Figure 12
)
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] and P0[28])
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 16
-11-ns
Fig 12. 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
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