mangOH Green DV4, Developer'S Manual, Page: 33 / 34

Hardware
Rev 2 Jun.16 33 4118903
Reset Methods
The mangOH Green supports hardware and software resets of the entire board or certain parts of the
board, as shown in
Figure 2-21 :
• Reset entire board, including the primary CF3 module, via the primary CF3 module’s
RESET_IN_N signal:
· Hardware (manual)—Press the Reset button (SW400)).
· Hardware (automatic)—When the low current detector is triggered.
When the board resets, it stays in the reset state as long as low current is detected.
• Reset everything except the primary CF3 module:
· Software—Use an API command to trigger GPIO6 (primary CF3 module pin 46), which
connects to the mangOH Green’s System_reset.
• Reset individual IoT Expansion Cards:
· Software—Use an API command to trigger specific GPIO expander signals:
· GPIO_IOT0_RESET—Reset IoT Expansion Card in slot IOT0.
· GPIO_IOT1_RESET—Reset IoT Expansion Card in slot IOT1.
· GPIO_IOT2_RESET—Reset IoT Expansion Card in slot IOT2.
• Reset the secondary CF3 module—use an API command to trigger the GPIO_SCF3_RESET
expander signal, which connects to the secondary CF3 module’s RESET_IN_N signal.
For detailed specifications showing how full or partial resets are enabled, see the mangOH Green
schematics available at
mangoh.io .
Figure 2-21: Reset Methods
Battery
Charger
Main CF3
USB HUB
(USB3503)
GPIO Expander #1
(SX1509)
Level Shifter
(VGPIO to 3.3V)
(NTB0101)
USB HUB +
LAN
(LAN9514)
IoT Expansion Card
in slot IOT0
IoT Expansion Card
in slot IOT1
IoT Expansion Card
in slot IOT2
Reset IoT #0
Reset IoT #1
Reset IoT #2
LowPower reset
GPIO Expander #2
(SX1509)
GPIO Expander #3
(SX1509)
CF3
LDO
PG_LDO
(open drain out)
Reset_SCF3
CF3 #2
System_reset
GPIO_SCF3_RESET
VCC_1V8
47k
47k
47k
NCP303
POR reset
3.0V
Reset
(open drain out)
Atmel CPU
WP2Arduino_reset
Atmega_Reset
V_ARD
Level
Translator
47k
47k
VCC_1V8
3V7
Not Installed
Reset
Button
VCC_1V8
47k
47k
VCC_1V8
Not Installed
47k
VCC_1V8
47k