Microsemi IGLOO nano Starter Kit, Руководство пользователя

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Power
1 6 R e v i s i o n 3
Table 2-2 gives a summary of the power modes available with IGLOO nano devices in general and is
extracted from the “Flash*Freeze Technology and Low Power Modes” chapter of the IGLOO nano FPGA
Fabric User’s Guide .
Battery
The VIN (minimum output voltage) for the battery is 3 V. Potentially two Alkaline cells or button cells,
such as LIR2450, can be used to power the board. In order to power through the higher voltage from the
power brick or lower voltage from the battery, special regulators are used to meet the voltage
requirements. The 3.3 V regulator used is a buck-boost type instead of a regular LDO type.
No battery casing is provided on the board. A 2-pin jumper for VBAT and GND must be provided to the
input of the main regulator; you have the option of powering through a wall/USB or powering through
external batteries.
Table 2-2 • Power Modes
Mode VCC VCCI Core Clocks
ULSICC
Macro To Enter Mode
To Resume
Operation Trigger
Active On On On On N/A Initiate clock None –
Static Idle On On On Off N/A Stop clock Initiate clock External
Flash*Freeze
Type 1
On On On On* N/A Assert FF pin Deassert FF pin External
Flash*Freeze
Type 2
On On On On* Used to enter
Flash*Freeze
mode
Assert FF pin
and LSICC
Deassert FF pin External
Sleep On Off Off Off N/A Shut down VCC Turn on VCC External
Shutdown Off Off Off Off N/A Shut down VCC
and VCCI
supplies
Turn on VCC
and VCCI
supplies
External
Note: *External clocks can be left toggling while the device is in Flash*Freeze mode. Clocks generated by the
embedded PLL will be turned off automatically.
Figure 2-2 • Battery Header and Power Input Schematics
VCC_BAT
Battery Header
1
2
J1
2x1 Header (M)
J1
2x1 Header (M)
VCC_in
VCC_BAT
Note:
Short Pins 2-1: Battery Power Input
Short Pins 2-3: Wall/USB Power Input
C1
10u-TantA
C1
10u-TantA
1
2
3
JP1
3x1 Header (M)
JP1
3x1 Header (M)
C2
2u2-0603
C2
2u2-0603