1747-6.22, Backup Scanner User Manual

7-142 RIO Block Transfer
Rung 2:7
When a BTW successfully completes unlatch the BTW enable bit and the BTW pending bit to complete a BTW
| sequence. Also, latch the bit that continues checking the BTW status until the SN module turns the done bit off. |
| |
| VIRTUAL |
| BTW DONE BTW |
| BIT PENDING |
| N7:64 B3 |
|----] [========================================================+----(U)-----+-|
| 13 | 1 | |
| | | |
| | | |
| | VIRTUAL | |
| | BTW ENABLE | |
| | BIT | |
| | N7:53 | |
| +----(U)=====+ |
| | 15 | |
| | | |
| | | |
| | | |
| | CHECK BTW | |
| | STATUS | |
| | B3 | |
| +----(L)-----+ |
| 3 |
Rung 2:8
When a BTW unsuccessfully completes, buffer the error code and unlatch the BTW enable bit and the BTW
pending bit. Also, latch the check BTW status bit in order to continue reading the status information from the
| scanner until it turns off the error bit, completing the handshake process.
|
| |
| VIRTUAL |
| BTW ERROR BTW ERROR |
| BIT CODE |
| N7:64 +MOV===============+ |
|----] [----------------------------------------------+-+MOVE +-+-|
| 12 | |Source M1:1.203| | |
| | | *| | |
| | |Dest N7:1| | |
| | | 0| | |
| | +------------------+ | |
| | | |
| | | |
| | | |
| | BTW | |
| | PENDING | |
| | B3 | |
| +----(U)---------------+ |
| | 1 | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | VIRTUAL | |
| | BTW ENABLE | |
| | BIT | |
| | N7:53 | |
| +----(U)===============+ |
| | 15 | |
| | | |
| | | |
| | | |
| | CHECK BTW | |
| | STATUS | |
| | B3 | |
| +----(L)---------------+ |
| 3 |
Publication 1747-6.22