Datasheet
LPC11U3X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 2.2 — 11 March 2014 48 of 77
NXP Semiconductors
LPC11U3x
32-bit ARM Cortex-M0 microcontroller
[2] The typical frequency spread over processing and temperature (T
amb
= 40 C to +85 C) is 40 %.
[3] See the LPC11Uxx user manual.
10.4 I/O pins
[1] Applies to standard port pins and RESET pin.
10.5 I
2
C-bus
[1] See the I
2
C-bus specification UM10204 for details.
[2] Parameters are valid over operating temperature range unless otherwise specified.
[3] tHD;DAT is the data hold time that is measured from the falling edge of SCL; applies to data in transmission and the acknowledge.
[4] A device must internally provide a hold time of at least 300 ns for the SDA signal (with respect to the V
IH
(min) of the SCL signal) to
bridge the undefined region of the falling edge of SCL.
[5] C
b
= total capacitance of one bus line in pF.
[6] The maximum t
f
for the SDA and SCL bus lines is specified at 300 ns. The maximum fall time for the SDA output stage t
f
is specified at
250 ns. This allows series protection resistors to be connected in between the SDA and the SCL pins and the SDA/SCL bus lines
without exceeding the maximum specified t
f
.
Table 14. Dynamic characteristics: I/O pins
[1]
T
amb
=
40
C to +85
C; 3.0 V
V
DD
3.6 V.
Symbol Parameter Conditions Min Typ Max Unit
t
r
rise time pin configured as output 3.0 - 5.0 ns
t
f
fall time pin configured as output 2.5 - 5.0 ns
Table 15. Dynamic characteristic: I
2
C-bus pins
[1]
T
amb
=
40
C to +85
C.
[2]
Symbol Parameter Conditions Min Max Unit
f
SCL
SCL clock
frequency
Standard-mode 0 100 kHz
Fast-mode 0 400 kHz
Fast-mode Plus 0 1 MHz
t
f
fall time
[4][5][6][7]
of both SDA and SCL
signals
Standard-mode
-300ns
Fast-mode 20 + 0.1 C
b
300 ns
Fast-mode Plus - 120 ns
t
LOW
LOW period of the
SCL clock
Standard-mode 4.7 - s
Fast-mode 1.3 - s
Fast-mode Plus 0.5 - s
t
HIGH
HIGH period of the
SCL clock
Standard-mode 4.0 - s
Fast-mode 0.6 - s
Fast-mode Plus 0.26 - s
t
HD;DAT
data hold time
[3][4][8]
Standard-mode 0 - s
Fast-mode 0 - s
Fast-mode Plus 0 - s
t
SU;DAT
data set-up time
[9][10]
Standard-mode 250 - ns
Fast-mode 100 - ns
Fast-mode Plus 50 - ns