The SP0256 Speech Board Interface William Henderson April 17, 2005 com 1 Interface Details This documents the interface between the SP0256 Speech Board and the TINI TutorIO microprocessor board.
The TutorIO board PIA connector is a 26-way IDC socket known as CONN3.
This carries the signals of the three 8-bit Ports A, B and C, ground and Vcc (5V).
Only Port A is employed by the Speech Board; Ports B and C remain unused.
Power to drive the Speech Board is also obtained from the TINI board via the CONN3 interface.
The command interface with the SP0256 Speech Board comprises 6 address lines (A1.
.
.
A6) and the ALD (Address LoaD) and LRQ (Load ReQuest) signals, 8 bits in total.
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