CFA633-RDI-KU datasheet(39/86 Pages) CRYSTAIFONTZ

39 / 86 page

Crystalfontz America, Inc.

Data Sheet Release Date 2012/02/21

www.crystalfontz.com

CFA633-RDI-KU LCD Module (Hardware v2.0 / Firmware u2v1)

February 2012

Page 39

To reset the host, assuming the host's reset line is connected to GPIO[3] as described in command 28 (0x1C): Set ATX

Power Switch Functionality (Pg. 52), send the following packet:

type: 0x05 = 510

valid data_length is 3

data[0] = 12

data[1] = 28

data[2] = 97

To turn the host's power off, assuming the host's power control line is connected to GPIO[2] as described in command

28 (0x1C): Set ATX Power Switch Functionality (Pg. 52), send the following packet:

type: 0x05 = 510

valid data_length is 3

data[0] = 3

data[1] = 11

data[2] = 95

NOTE

The reboot command may take up to 3 seconds to return its acknowledge packet.

At bootup, there is up to a 500ms (1/2 second) delay between turning on fans. By default, all four fans

are set to “on” at 100%. If you are not using a fan, set power to 0% (command 17 (0x11): Set Fan Power)

and save this setting as the default boot state (command 4 (0x04): Store Current State As Boot State).

This will reduce the boot time.

If only one fan is on, there is no additional delay. If two fans are on, there is up to an additional 500ms

delay. If three fans are on, there is a up to an additional 1,000ms delay. If all four fans are on, there is

up to an additional 1,500ms delay.

NOTE

The CFA633 will return the acknowledge packet immediately, then reset the host. After resetting the host

(~1.5 seconds), the module will reboot itself. The module will not respond to new command packets for up

to 3 seconds (~4.5 seconds overall) after its reboot. Part of this delay is the intentional staggered

sequencing of turning on power to the fans. If you are not using fans, you can speed the boot process by

setting the fan power to 0 (command 17 (0x11): Set Fan Power and saving this as the default boot state

(command 4 (0x04): Store Current State As Boot State). Normally, the host will be recovering from its own

reset, so the boot delay of the module will not be of consequence.

# of Fans

Powered On

Expected Boot

Time

0 to 1

300ms - 500ms

800ms - 1,000ms

31.3s - 1.5s

41.8s - 2.0s

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