Microchip Technology MPLAB ICD 5 - Page 24

Connecons
User Guide
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DS-50003529B - 24
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AVR PORT Pins Target Pins SPI Pinout
Pin 10 (GND)
3.3.5.5 AVR PDI
The Program and Debug Interface (PDI) is a Microchip proprietary interface for external
programming and on-chip debugging of a device. PDI Physical is a 2-pin interface providing a
bidirectional half-duplex synchronous communication with the target device.
3.3.5.5.1 Connecng to an AVR PDI Target
The recommended pinout for the 6-pin PDI connector is shown in 3.3.5.5.2. AVR PDI Pinout.
Connection to a 6-pin 100-mil PDI Header
Use the AVR 6-pin adapter board to connect to connect to a standard 100-mil PDI header.
Connection to a 6-pin 50-mil PDI Header
Use the AVR 6-pin mini adapter board to connect to a standard 50-mil PDI header.
3.3.5.5.2 AVR PDI Pinout
When designing an application PCB, which includes a Microchip AVR with the PDI interface, the
pinout shown in the gure below, should be used.
Figure 3-14. PDI Header Pinout
PDI_DATA
PDI_CLK
VCC
GND
1 2
PDI
(NC)
(NC)
Table 3-9. PDI Pin Mapping
AVR PORT Pin Target Pins Microchip STK600 PDI Pinout
Pin 1 (TCK)
Pin 2 (GND) GND 6
Pin 3 (TDO) PDI_DATA 1
Pin 4 (VTG) VTG 2
Pin 5 (TMS)
Pin 6 (nSRST) PDI_CLK 5
Pin 7 (not connected)
Pin 8 (nTRST)
Pin 9 (TDI)
Pin 10 (GND)
3.3.5.6 AVR UPDI
The Unied Program and Debug Interface (UPDI) is a Microchip proprietary interface for external
programming and on-chip debugging of a device. It is a successor to the PDI two-wire physical
interface, which is found on all AVR XMEGA devices. UPDI is a one-wire interface providing a
bidirectional half-duplex asynchronous communication with the target device for purposes of
programming and debugging.
3.3.5.6.1 UPDI and /RESET
The UPDI one-wire interface can be a dedicated pin or a shared pin, depending on the target AVR
device. Consult the device data sheet for further information.
When the UPDI interface is on a shared pin, the pin can be congured to be either UPDI, /RESET, or
GPIO by setting the RSTPINCFG[1:0] fuses.