Datasheet

LPC11CX2_CX4 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3.1 — 15 May 2013 40 of 62
NXP Semiconductors
LPC11Cx2/Cx4
32-bit ARM Cortex-M0 microcontroller
9.5 Peripheral power consumption
The supply current per peripheral is measured as the difference in supply current between
the peripheral block enabled and the peripheral block disabled in the SYSAHBCLKCFG
and PDRUNCFG (for analog blocks) registers. All other blocks are disabled in both
registers and no code is executed. Measured on a typical sample at T
amb
=25 C. Unless
noted otherwise, the system oscillator and PLL are running in both measurements.
The supply currents are shown for system clock frequencies of 12 MHz and 48 MHz.
Table 11. Power consumption for individual analog and digital blocks
Peripheral Typical supply current in
mA
Notes
n/a 12 MHz 48 MHz
IRC 0.27 - - System oscillator running; PLL off;
independent of main clock frequency.
System oscillator
at 12 MHz
0.22 - - IRC running; PLL off; independent of main
clock frequency.
Watchdog
oscillator at
500 kHz/2
0.004 - - System oscillator running; PLL off;
independent of main clock frequency.
BOD 0.051 - - Independent of main clock frequency.
Main PLL - 0.21 -
ADC - 0.08 0.29
CLKOUT - 0.12 0.47 Main clock divided by 4 in the CLKOUTDIV
register.
CT16B0 - 0.02 0.06
CT16B1 - 0.02 0.06
CT32B0 - 0.02 0.07
CT32B1 - 0.02 0.06
GPIO - 0.23 0.88 GPIO pins configured as outputs and set to
LOW. Direction and pin state are maintained if
the GPIO is disabled in the SYSAHBCLKCFG
register.
IOCONFIG - 0.03 0.10
I2C - 0.04 0.13
ROM - 0.04 0.15
SPI0 - 0.12 0.45
SPI1 - 0.12 0.45
UART - 0.22 0.82
C_CAN - 0.03 0.1
WDT - 0.02 0.06 Main clock selected as clock source for the
WDT.