Digi NS9750 Benutzerhandbuch
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N S 9 7 5 0 H a r d w a r e R e f e r e n c e
Nibble mode
Nibble mode can send a byte of information to the host by sending two nibbles. This
mode operates only in reverse mode.
mode operates only in reverse mode.
Figure 97 shows the timing relationship on the port interface.
Figure 97: Nibble mode data transfer cycles
Byte mode
Byte mode sends information to the host over the data lines, at 8 bits per cycle. The
peripheral sets the PtrClk bit high to acknowledge the host.
peripheral sets the PtrClk bit high to acknowledge the host.
Figure 98 shows the timing relationship on the port interface.
Figure 98: IEEE 1284 byte mode data transfer cycle