Microchip Technology MPLAB ICD 5 - Page 26

Connecons
User Guide
© 2023 Microchip Technology Inc. and its subsidiaries
DS-50003529B - 26
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AVR PORT Pin Target Pins Microchip STK600 UPDI Pinout
Pin 5 (TMS)
Pin 6 (nSRST)
Pin 7 (Not connected)
Pin 8 (nTRST)
Pin 9 (TDI)
Pin 10 (GND)
3.3.5.7 AVR TPI
TPI is a programming-only interface for some tinyAVR devices. It is not a debugging interface and
these devices do not have OCD capability.
3.3.5.7.1 Connecng to an AVR TPI Target
The recommended pinout for the 6-pin TPI connector is shown in 3.3.5.7.2. AVR TPI Pinout.
Connection to a 6-pin 100-mil TPI Header
Use the AVR 6-pin adapter board to connect to a standard 100-mil TPI header.
Connection to a 6-pin 50-mil TPI Header
Use the AVR 6-pin mini adapter board to connect to a standard 50-mil TPI header.
3.3.5.7.2 AVR TPI Pinout
When designing an application PCB, which includes an AVR with the TPI interface, the pinout shown
in the gure below, should be used.
Figure 3-16. TPI Header Pinout
TPIDATA
TPICLK
/RESET
VCC
GND
1 2
TPI
(NC)
Table 3-12. TPI Pin Mapping
AVR PORT Pins Target Pins TPI Pinout
Pin 1 (TCK) CLOCK 3
Pin 2 (GND) GND 6
Pin 3 (TDO) DATA 1
Pin 4 (VTG) VTG 2
Pin 5 (TMS)
Pin 6 (nSRST) /RESET 5
Pin 7 (not connected)
Pin 8 (nTRST)
Pin 9 (TDI)
Pin 10 (GND)
3.3.5.8 AVR debugWIRE
The debugWIRE interface is for use on low pin-count devices. Unlike the JTAG interface which
uses four pins, debugWIRE makes use of just a single pin (/RESET) for bidirectional half-duplex
asynchronous communication with the debugger tool.