Microchip Technology ATtiny1627 Curiosity Nano, Hardware User'S Manual

Page: 26 / 39

Figure 4-2. Crystal Connection and Cut Straps
A crystal with 7pF equivalent load capacitance and 70kΩ ESR (XC200) and two 4.7pF external matching capacitors
for C203 and C204 have been tested to yield good results on this board. See the
7.2 Assembly Drawing for footprint
locations.
Table 4-3. Crystal Connections
ATtiny1627 Pin Function Shared Functionality
PB3 TOSC1 (input) Edge connector
PB2 TOSC2 (output) Edge connector
4.2.4 On-Board Debugger Implementation
ATtiny1627 Curiosity Nano features an on-board debugger that can be used to program and debug the ATtiny1627
using UPDI. The on-board debugger also includes a virtual serial port (CDC) interface over UART and debug GPIO.
Atmel Studio/Microchip MPLAB
®
X IDE can be used as a front-end for the on-board debugger for programming and
debugging. MPLAB Data Visualizer can be used as a front-end for the CDC and debug GPIO.
4.2.4.1 On-Board Debugger Connections
The table below shows the connections between the target and the debugger section. All connections between the
target and the debugger are tri-stated as long as the debugger is not actively using the interface. Hence, since there
are little contaminations of the signals, the pins can be configured to anything the user wants.
For further information on how to use the capabilities of the on-board debugger, see 3.1 On-Board Debugger
Overview .
Table 4-4. On-Board Debugger Connections
ATtiny1627 Pin Debugger Pin Function Shared Functionality
PB3 CDC TX UART RX (ATtiny1627 RX line) Edge connector
PB2 CDC RX UART TX (ATtiny1627 TX line) Edge connector
PA0 DBG0 UPDI Edge connector
PB7 DBG1 GPIO1 Edge connector and LED
PC4 DBG2 GPIO0 Edge connector and SW0
(PA0) DBG3 RESET/GPIO Edge connector
ATtiny1627
Hardware User Guide
©
2020 Microchip Technology Inc.
User Guide
DS40002199A-page 26