LPC122X All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 2 — 26 August 2011 34 of 61
NXP Semiconductors
LPC122x
32-bit ARM Cortex-M0 microcontroller
10.1 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 and
V
DD(3V3)
= 3.3 V.
10.2 Power consumption
Power measurements in Active, Sleep, and Deep-sleep modes were performed under the
following conditions (see LPC122x user manual):
• Active mode: all GPIO pins set to input with external pull-up resistors.
• Sleep and Deep-sleep modes: all GPIO pins set to output driving LOW.
• Deep power-down mode: all GPIO pins set to input with external pull-up resistors.
Table 8. Peripheral power consumption
Peripheral Typical current consumption I
DD
in mA
Frequency
independent
24 MHz 12 MHz
system
oscillator + PLL
IRC + PLL system
oscillator
IRC
IRC 0.29 - - - -
PLL (PLL output
frequency = 24 MHz)
1.87 - - - -
WDosc (WDosc output
frequency = 500 kHz)
0.25 - - - -
BOD 0.06 - - - -
Analog comparator 0/1 - 0.05 0.05 0.03 0.02
ADC - 1.86 1.85 1.61 1.61
CRC engine - 0.04 0.04 0.02 0.02
16-bit timer 0 (CT16B0) - 0.09 0.09 0.04 0.04
16-bit timer 1 (CT16B1) - 0.09 0.09 0.04 0.04
32-bit timer 0 (CT32B0) - 0.08 0.08 0.04 0.04
32-bit timer 1 (CT32B1) - 0.08 0.08 0.04 0.04
GPIO0 - 0.34 0.34 0.17 0.17
GPIO1 - 0.34 0.34 0.17 0.17
GPIO2 - 0.36 0.37 0.18 0.18
I2C - 0.09 0.09 0.05 0.05
IOCON - 0.09 0.10 0.05 0.05
RTC - 0.10 0.10 0.05 0.05
SSP - 0.30 0.29 0.15 0.15
UART0 - 0.52 0.51 0.26 0.26
UART1 - 0.52 0.51 0.26 0.26
DMA - 0.18 0.18 0.09 0.09
WWDT - 0.06 0.06 0.03 0.03
