Datasheet
LPC55S6x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2019. All rights reserved.
Product data sheet Rev. 1.0 — 26 February 2019 89 of 123
NXP Semiconductors
LPC55S6x
32-bit ARM Cortex-M33 microcontroller
11.8 FRO (32 KHz)
[1] Typical ratings are not guaranteed. The values listed are at room temperature (25 C), nominal supply
voltages.
11.9 RTC oscillator
See Section 13.4 for connecting the RTC oscillator to an external clock source.
[1] Parameters are valid over operating temperature range unless otherwise specified.
11.10 I
2
C-bus
[1] Guaranteed by design. Not tested in production.
[2] Parameters are valid over operating temperature range unless otherwise specified. See the I
2
C-bus specification UM10204 for details.
[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.
Table 31. Dynamic characteristic: FRO
T
amb
= 40 C to +105 C; 1.8 V VBAT_DCDC
3.6 V.
Symbol Parameter Conditions Min Typ
[1]
Max Unit
f
osc(RC)
FRO clock frequency - 32.11 32 33.42 KHz
Table 32. Dynamic characteristic: RTC oscillator
T
amb
= 40 C to +105 C; 1.8 VBAT_DCDC
3.6
[1]
Symbol Parameter Conditions Min Typ
[1]
Max Unit
f
i
input frequency - - 32.768 kHz
Table 33. Dynamic characteristic: I
2
C-bus pins
[1]
T
amb
= 40 C to +105 C; 1.8 V VBAT_DCDC
3.6 V.
[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
- 300 ns
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