Host Protocols Direct Protocol PROTOCOL class HOST EVENT POLL
September 3, 2025 at 8:28 AMHOST EVENT POLL instruction
Use the HOST EVENT POLL instruction to receive the device’s event message, when the device has asserted its /WAKEUP line.
INS value
INS = FE
Command
| Field | Value | Explanations |
|---|---|---|
| CLA | 00 |
Class = PROTOCOL |
| INS | FE |
Instruction = HOST EVENT POLL |
| Data | (empty) |
Response
| Field | Value | Explanations |
|---|---|---|
| CLA | Depends on event | |
| STA | Depends on event | |
| Data | Depends on event |
Warning only for this instruction, the PCB of the Response has Channel (bit 6) set to 1 (interrupt).