beautypg.com

Peripheral devices power management – Eurotech Appliances ZEUS PXA270 User Manual

Page 68

background image

ZEUS Technical Manual

Power and power management

© 2007 Eurotech Ltd Issue D

68

Peripheral devices power management

The following table gives the estimated power consumption of on-board peripherals:

Low power mode

On-board
peripheral

Maximum power
consumption

Minimum consumption

Operating mode

Quad UART

66mW ([email protected])

10mW ([email protected])

Idle

Ethernet 2x

DM9000A

607mW ([email protected])

46mW ([email protected])

Power-down

CAN MCP2515 50mW (10mA@5V)

0.025mW (5uA@5V)

Sleep

CAN transceiver 375mW (75mA@5V)

1.8mW (200uA@5V)

Standby

AC’97 Codec

WM9712L

80mW

0.001mW

OFF

Boomer Amp

LM4880

30mW (6mA@5V)

0.025mW (5uA@5V)

Shut-down

SDRAM x4

2640mW ([email protected]) 26.4mW ([email protected]) Power-down

Flash

165mW ([email protected])

0.015mW ([email protected])

Standby

SRAM

72mW ([email protected])

0.001mW ([email protected])

Standby

RS485

6.6mW ([email protected])

5mW ([email protected])

Disable

CPLD x2

66mW ([email protected])

20mW ([email protected])

Idle

LVDS transceiver 165mW ([email protected])

0.17mW (55uA@3V)

Power-down

I/O expander x2 1.6mW ([email protected])

0.02mW ([email protected]) Idle

RTC

0.4mW ([email protected])

0.012mW ([email protected])

Idle

Temperature

sensor

3.3mW ([email protected])

0.010mW ([email protected]) Shut-down

Config PROM

3.3mW ([email protected])

0.003mW ([email protected])

Standby

Total 4.5W

102mW

External peripheral devices include CF+ card (1.5W max), two USB devices (5W max),

add-on PC/104 cards (5W max), wireless modem (8.5W peak), LCD and Inverter (4W

max), GPS module (50mW max), ZigBee module (30mW max), SDIO (350mW max)

and Quick Capture camera (50mW max).