Datasheet
LPC185X_3X_2X_1X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4.1 — 6 May 2014 97 of 148
NXP Semiconductors
LPC185x/3x/2x/1x
32-bit ARM Cortex-M3 microcontroller
10.2 Peripheral power consumption
The typical power consumption at T = 25 C for each individual peripheral is measured as
follows:
1. Enable all branch clocks and measure the current I
DD(REG)(3V3)
.
2. Disable the branch clock to the peripheral to be measured and keep all other branch
clocks enabled.
3. Calculate the difference between measurement 1 and 2. The result is the peripheral
power consumption.
Conditions: V
DD(REG)(3V3)
= 3.0 V; V
BAT
= 2.6 V to 3.6 V; CCLK = 12 MHz.
Remark: The recommended operating condition for the battery supply is
V
DD(REG)(3V3)
> V
BAT
+ 0.2 V.
Fig 18. Typical battery supply current in Active mode
002aah379
-0.4 -0.2 0 0.2 0.4 0.6
0
20
40
60
80
100
V
BAT
- V
DD(REG)(3V3)
(V)
I
BAT
(μA)
Table 12. Peripheral power consumption
Peripheral Branch clock I
DD(REG)(3V3)
in mA
Branch clock
frequency = 48 MHz
Branch clock
frequency = 96 MHz
I2C1 CLK_APB3_I2C1 0.01 0.01
I2C0 CLK_APB1_I2C0 < 0.01 0.02
DAC CLK_APB3_DAC 0.01 0.02
ADC0 CLK_APB3_ADC0 0.07 0.07
ADC1 CLK_APB3_ADC1 0.07 0.07
CAN0 CLK_APB3_CAN0 0.17 0.17
CAN1 CLK_APB1_CAN1 0.16 0.15
MOTOCON CLK_APB1_MOTOCON 0.04 0.04
I2S CLK_APB1_I2S 0.09 0.08
SPIFI CLK_SPIFI,
CLK_M3_SPIFI
1.14 2.29
GPIO CLK_M3_GPIO 0.72 1.43