Transcend Information TS32GSSD25S-S - Manual (Page 13)

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T T T S S S 1 1 1 9 9 9 2 2 2 G G G S S S S S S D D D 2 2 2 5 5 5 S S S - - - M M M 2.5” Solid State Disk
Transcend Information Inc.
V2.2
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host, the device assumes that the host cannot communicate at that speed. If additional speeds are available the
device tries the next lower supported speed by sending ALIGN
P
Dwords at that rate for 54.6 us (2048 nominal Gen1 Dword
times.) This step is repeated for as many slower speeds as are supported. Once the lowest speed has been reached
without response from the host, the device enters an error state.
5. Host locks – after detecting the COMWAKE, the host starts transmitting D10.2 characters at its lowest supported rate.
Meanwhile, the host receiver locks to the ALIGN sequence and, when ready, returns the ALIGN sequence to the device at
the same speed as received. A host shall be designed such that it acquires lock in 54.6 us (2048 nominal Gen1 Dword
times) at any given speed. The host should allow for at least 873.8 us (32768 nominal Gen1 Dword times) after detecting
the release of COMWAKE to receive the first ALIGN P . This ensures interoperability with multi-generational and
synchronous designs. If no ALIGN P is received within 873.8 us (32768 nominal Gen1 Dword times) the host restarts the
power-on sequence – repeating indefinitely until told to stop by the Application layer. 6. Device locks – the device locks to
the ALIGN sequence and, when ready, sends SYNC
P
indicating it is ready to start normal operation.
6. Upon receipt of three back-to-back non-ALIGN
P
primitives, the communication link is established and normal operation
may begin.