X25AM Programming Manual

PTP Applications
X25AM Programming Manual—527201-001
3-10
Mode 2
The following application buffer contents are used in mode 2:
•
MCW
°
Packet type
°
D, Q, and M bits as required
•
Remainder of packet when appropriate
Valid Packet Types for Mode 2
PTP cannot write some packet types, but it can read them. If the application process
attempts to write one of these buffer structures, the result is error 179 (application
buffer incorrect). The following packets can only be read by the application process:
•
Receive Ready
•
Receive Not Ready
•
Interrupt Confirmation
•
Reset Confirmation
•
Clear Confirmation
•
Restart Request
•
Restart Confirmation
•
Diagnostic
Table 3-4. Packets and Buffers Used by Data-Exchange Mode 2
Packets Used with
WRITE Packets Used with READ
Data Data
Receive Ready
Receive Not Ready
Call Request Call Indication
Call Accepted Call Connected
Clear Request Clear Indication
Clear Confirmation
Reset Request Reset Indication
Reset Confirmation
Interrupt Interrupt
Interrupt Confirmation
Diagnostic
Restart Indication
Restart Confirmation