Rohde & Schwarz RTP044 - Page 874

Protocol analysis
R&S
®
RTP
874User Manual 1337.9952.02 ─ 12
●
Data link layer: used for link management and data integrity. Error detection and
correction are also done in this layer. The data link layer produces data link layer
packets (DLLP).
●
Physical layer: includes the circuitry for the interface operation.
PCIe Packet Types
The communication between the layers is done through packets. All packet types that
can be decoded by the R&S RTP are listed below.
SCPI name Description Type
MRD32 / MRD64 Memory Read Request for 32 bit/ 64-bit
addresssing packet format
TLP
MRDLK32 / MRDLK64 Memory Read Request-Locked for 32 bit/
64-bit addresssing packet format
TLP
MWR32 / MWR64 Memory Write Request for 32 bit/ 64-bit
addresssing packet format
TLP
IORD I/O Read Request TLP
IOWR I/O Write Request TLP
CFGRD0 / CFGRD1 Configuration Read Type 0/1 TLP
CFGWR0 / CFGWR1 Configuration Write Type 0/1 TLP
TCfgRd / TCfgWr Deprecated TLP Type TLP
MSG Message Request TLP
MSGD Message Request with data payload TLP
CPL Completion without Data TLP
CPLD Completion with Data TLP
CPLLK Completion for Locked Memory Read
without Data
TLP
CPLDLK Completion for Locked Memory Read TLP
FA32 / FA64 Fetch and Add AtomicOp Request for 32
bit/ 64-bit addresssing packet format
TLP
SWP32 / SWP64 Unconditional Swap AtomicOp Request
for 32 bit/ 64-bit addresssing packet for-
mat
TLP
CAS32 / CAS64 Compare and Swap AtomicOp Request
for 32 bit/ 64-bit addresssing packet for-
mat
TLP
LPRFX Local TLP Prefix TLP
EPRFX End-End TLP Prefix TLP
EDB TLP
ACK Acknowledgement DLLP
NAK Negative acknowledgment DLLP
PCIe (option R&S RTP-K72/K73)