Datasheet
LPC178X_7X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 5 — 9 September 2014 76 of 122
NXP Semiconductors
LPC178x/7x
32-bit ARM Cortex-M3 microcontroller
10.2 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 PCONP register. All
other blocks are disabled and no code is executed. Measured on a typical sample at
T
amb
=25C. The peripheral clock was set to PCLK = CCLK/4 with CCLK = 12 MHz,
48 MHz, and 120 MHz.
The combined current of several peripherals running at the same time can be less than
the sum of each individual peripheral current measured separately.
Table 14. Power consumption for individual analog and digital blocks
T
amb
=25
C; V
DD(REG)(3V3)
= V
DD(3V3)
= V
DDA
= 3.3 V; PCLK = CCLK/4.
Peripheral
Conditions Typical supply current in mA
12 MHz
[1]
48 MHz
[1]
120 MHz
[2]
Timer0 - 0.01 0.06 0.15
Timer1 - 0.02 0.07 0.16
Timer2 - 0.02 0.07 0.17
Timer3 - 0.01 0.07 0.16
Timer0 + Timer1 + Timer2 + Timer3 - 0.07 0.28 0.67
UART0 - 0.05 0.19 0.45
UART1 - 0.06 0.24 0.56
UART2 - 0.05 0.2 0.47
UART3 - 0.06 0.23 0.56
USART4 - 0.07 0.27 0.66
UART0 + UART1 + UART2 + UART3 +
USART4
- 0.29 1.13 2.74
PWM0 + PWM1 - 0.08 0.31 0.75
Motor control PWM - 0.04 0.15 0.36
I2C0 - 0.01 0.03 0.08
I2C1 - 0.01 0.03 0.1
I2C2 - 0.01 0.03 0.08
I2C0 + I2C1 + I2C2 - 0.02 0.1 0.26
SSP0 - 0.03 0.1 0.26
SSP1 - 0.02 0.11 0.27
DAC - 0.3 0.31 0.33
ADC (12 MHz clock) - 1.51 1.61 1.7
CAN1 - 0.11 0.44 1.08
CAN2 - 0.1 0.4 0.98
CAN1 + CAN2 - 0.15 0.59 1.44
DMA PCLK = CCLK 1.1 4.27 10.27
QEI - 0.02 0.11 0.28
GPIO - 0.4 1.72 4.16
LCD - 0.99 3.84 9.25
I2S - 0.04 0.18 0.46