Microchip Technology megaAVR 0 Series Manual page 463

29.5.2 Status B
Name: STATUSB
Offset: 0x01
Reset: 0x00
Property: -
Bit 7
Access
Reset
Bits 2:0 – PESIG[2:0] UPDI Error Signature
These bits describe the UPDI Error Signature and are set when an internal UPDI error condition occurs.
The PESIG field is cleared on a read from the debugger.
Table 29-6. Valid Error Signatures
PESIG[2:0] Error Type
0x0 No error
0x1 Parity error
0x2 Frame error
0x3 Access Layer Time-out Error UPDI can get no data or response from the Access layer.
0x4 Clock Recovery error
0x5 -
0x6 Reserved
0x7 Contention error
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2018 Microchip Technology Inc.
6 5
Unified Program and Debug Interface (UPDI)
4 3
Error Description
No error detected (Default)
Wrong sampling of the parity bit
Wrong sampling of frame Stop bits
Examples of error cases are system domain in Sleep or
system domain Reset.
Wrong sampling of frame Start bit
Reserved
Reserved
Signalize Driving Contention on the UPDI RXD/TXD line
Datasheet Preliminary
®
megaAVR 0-Series
2 1
PESIG[2:0]
R R
0 0
DS40002015A-page 463
0
R
0