Expansion Connector Interfaces - mangOH Yellow Hardware Architecture Manual

2.7 Expansion Connector Interfaces

The mangOH Yellow provides an expansion connector (CN805), that can be used to connect an external device to
the mangOH Yellow. The external device can be powered by the mangOH Yellow, or the mangOH Yellow can be
powered by the external device.
The default configuration (enabled signals) for the expansion connector is shown in
The Expansion Connector interface configuration can be modified as detailed in
Table 2-10: Expansion Connector Interface Configuration Changes
Change type
Hardware Jumper on CN801 pins 1–2 —
•
Select CF3 Client USB power
Jumper on CN801 pins 2–3—
•
Select Expansion Connector
power (or CON USB connector if
resistor populated/
depopulated—see next row for
details).
Use CON USB connector for
•
power instead of Expansion
Connector.
VIN_CONN
CF3
LOWPOWER _RESET
GPIO6
Reset button (SW401)
USB Hub
HSIC
(U703)
UART1
ADC2
I 2C1
GPIO_24
GPIO_33
Figure 2-26: Expansion Connector Configuration
Rev 2 Oct.19
Change effect
VCC_3V3
(Power supplied from mangOH Yellow to CN805)
(Power from CN805 supplied to mangOH Yellow)
USB-SPI
Bridge
I2C Expander
Note: Default configuration — Solid lines
Alternate configuration — Dashed lines
Method
Position jumper on CN801 to
choose Client USB or
Expansion Connector to supply
power.
Note: mangOH Yellow ships
with USB power connector
selected (jumper on pins closest
to USB connector).
Populate R809, depopulate
R800
SYSTEM _RESET
35
Hardware
Figure 2-26.
Table 2-10.
Change duration
mangOH Yellow uses the
selected power supply until the
jumper changes.
Permanent
Expansion Connector
(CN805)
Input Power
Output Power
Reset
SPI2
UART
ADC
I2C
GPIO
GPIO
41113116