Vescent ICE, Oem Integration Manual

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Last update: 2014/07/30 18:37 ice:oem_integration http://www.vescent.com/manuals/doku.php?id=ice:oem_integration
http://www.vescent.com/manuals/ Printed on 2019/05/01 00:16
Power On Sequence
Step Action
1 Enable 5V_D rail
2 Enable external 3.3V pull-up resistors on I
2
C and GPIO
1)
3 15V rail
4 12V rail
5 Enable -15V rail
6 Enable -12V rail
7 Enable 5V_A rail
8 Wait 2.5 seconds
9 Broadcast System Ready I
2
C command
2)
10 Broadcast Interlock Off I
2
C command
3)
Power Off Sequence
Step Action
1 Broadcast Shutdown I 2
C command
4)
2 Wait 1 second
3 Disable 5V_A rail
4 Disable -12V rail
5 Disable -15V rail
6 D12V rail
7 D15V rail
8 Disable external 3.3V pull-up resistors on I
2
C and GPIO
5)
9 Disable 5V_D rail
Power Button
The ICE-MC1 master controller is designed to allow a push switch to be wired up to turn on and
shutdown the ICE stack. There is a 4-pin Molex connector ( Molex PN: 22-05-3041 ) which allows for
connection to a “OFF-Mom” style (normally off, momentary on) push switch and power for an LED to
indicate power state. The pin diagram is shown in
figure 3 , labeled as “Power Switch”. For reference,
the pin definition is shown in table 1 .
Pin Name Function
1 Switch Connect to one terminal of push switch
2 GND_D Connect to other terminal of push switch
3 LED+ Provides 5V to connect to positive terminal of LED
4
LED- Connected to ground (GND_D) through 249Ω resistor and transistor
Tab. 1: Pin definitions for power switch connector
The momentary push switch should short to GND_D (provided on the connector) when activated. The
master controller handles switch debouncing and will toggle the system power on and off with each
press of the switch. For testing and toggling system power without an external switch connected,
there is a SMD tactile switch located on the underside of the master controller circuit board that is
wired in parallel to the external switch.