Microchip Technology ATtiny3217 Curiosity Nano, Руководство пользователя по оборудованию

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Figure 4-2. Crystal Connection and Cut Straps
A crystal with 7pF equivalent load capacitance and 70kΩ ESR (XC200) and one 10pF external matching capacitor
(C203), and one 13pF external matching capacitor (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
ATtiny3217 Pin Function Shared Functionality
PB3 TOSC1 (input) Edge connector
PB2 TOSC2 (output) Edge connector
4.2.4 On-Board Debugger Implementation
ATtiny3217 Curiosity Nano features an on-board debugger that can be used to program and debug the ATtiny3217
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
ATtiny3217 Pin Debugger Pin Function Shared Functionality
PB3 CDC TX UART0 RX (ATtiny3217 RX line) Edge connector
PB2 CDC RX UART0 TX (ATtiny3217 TX line) Edge connector
PA0 DBG0 UPDI Edge connector
PA3 DBG1 GPIO1 Edge connector
PB7 DBG2 GPIO0 Edge connector
ATtiny3217
Hardware User Guide
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2020 Microchip Technology Inc.
User Guide
DS40002193A-page 26