LPC1786 datasheet(76/117 Pages) NXP

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LPC178X_7X

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Objective data sheet

Rev. 2 — 27 May 2011

76 of 117

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

Tamb =25 C. 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 12.

Power consumption for individual analog and digital blocks

Tamb =25 C, VDD(REG)(3V3) = <tbd> V. PCLK = CCLK/4.

Peripheral

Conditions

Typical supply current in mA

12 MHz

48 MHz

120 MHz

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

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