Elma JetKit-3010, Руководство пользователя

Страница: 30 / 44

USER MANUAL JetKit-3010 ELMA.COM
www.elma.com EMBEDDED BOARDS
Table 11 - PD controller current advertisement
CHG CHG_HI CC Capability
Broadcast Current Limit
(typical) Load Detect
threshold (typ.)
0 0 STD 1.7 A N/A
0 1 STD 1.7 A N/A
1 0 1.5 A 1.7 A N/A
1 1 3 A 3.4 A 1.95 A
The maximum 5V current capability of the JetKit-3010 is 8 A. This current is shared
between the BMC including additional logic components, the NVIDIA
® Xavier™
(SYS_VIN_MV) and the USB ports.
Modifications of the charging current is under own risk and can make the
board unstable in case of an overcurrent!
3.5 Power Management
The BMC of the JetKit-3010 is ready to support an ATX based or AT based system.
AT based systems are designed supporting only main voltages. In case of a CompactPCI Serial
based system, this means that only 12V is available.
An ATX based system provides also a standby voltage, i.e. 5V standby in CompactPCI Serial.
To support both, the BMC can be operated from 5V standby directly or from 5V generated by the
12V main voltage. In case operation from 5V standby is not desired, the board provides the option
to disable 5V standby support.
In ATX mode, a system normally provides 5V standby as soon as primary power is applied. To
enable main power, the PSU needs to be enabled. In a CompactPCI Serial based system, the signal
PS_ON# needs to be pulled to GND to enable the PSU main power.
The BMC can be configured for two operations:
- Auto Power: Enables the PS_ON# as soon as the BMC has booted up
- Manual Power: Waits for a power on event. Power on events are:
o
Power Button press (via PWRBTN# signal)
o
Wake event (via WAKE_IN# signal)
In case the board is plugged into a peripheral slot, it is expected that the system board controls
the main power. In that case, the board boots up as soon as main power is applied.
See Table 34 in chapter 4 for information about how to configure the board for 5V standby and
auto power operation.
3.6 Board Reset
The JetKit-3010 receives the reset from the CompactPCI Serial system and also controls the reset
output, in case the board is used in the system slot.
The reset input and output can be configured for different behaviors.
The reset input can be received the BMC and a soft reset is performed. Alternatively, the reset can
be connected to the BMC reset input so that a hard reset is performed on the BMC.
When receiving an incoming reset, the BMC also triggers the reset output in case the board is used
in a system slot. It is also possible to configure the board that the reset input is automatically
propagated to the reset output by hardware.
See Table 33 in chapter 4 for information on hardware configuration of the board reset.