ATmega168PB Xplained Mini User Guide [USER GUIDE]
42381A-MCU-10/2014
11
Table 2-5. J201 I/O Low Header
J201 pin
ATmega168PB pin
Note
J201-1
PD0/RxD
Target USART Receive Pin.
J201-2
PD1/TxD
Target USART Transmit Pin.
J201-3
PD2
J201-4
PD3
J201-5
PD4
J201-6
PD5
J201-7
PD6
J201-8
PD7
2.3.5
Target Analogue I/O (J203)
The ATmega168PB analogue I/O pins are available in the J203 header.
Table 2-6. J200 Analogue Header
J203 pin
ATmega168PB pin
J203-1
PC0
J203-2
PC1
J203-3
PC2
J203-4
PC3
J203-5
PC4
J203-6
PC5
2.3.6
Power (J202, J300, J301)
The J300 and J301 headers enables selection of power sources and target supply power, the J202 header
enables connection to the power system.
Table 2-7. J202 Power Header
J202 pin
Signal
Description
1
NC.
2
VCC_TARGET
ATmega168PB supply voltage.
3
RESET_SENSE
RESET from external source, monitored by the mEDBG, if pulled low the
target RESET line will be pulled low. This functionality is NOT available
during a debugging session because the RESET line is actively used by
the debugWIRE interface. Applying a signal to RESET_SENSE while
debugging may result in unexpected behaviour. It is possible to connect
RESET_SENSE directly to the target by assembling R212 and removing
R110. Note: DebgWIRE will then be disabled.
4
VCC_P3V3
3.3V from on-board DC/DC converter (U300).
5
VCC_P5V0
Voltage from the selected power source, default VBUS.
6
GND
7
GND
8
VCC_VIN
The externally connected power source if any.
2.3.6.1
Power Supply Configuration
The J300 and J301 headers enables Power supply configuration.
