Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
58 words
A keyboard interface for a multi-function CPU (11) including a CPU (12) and its adjacent circuits (13,14, 15,16), characterised in that said keyboard interface uses a bi-directional bus line (17) to output a scan data signal of a keyboard matrix (23) as well as to read out a return signal of said keyboard matrix (23) (e.g. Fig. 2).
Claim 2
Dependent Claim
58 words
A keyboard interface for a multi-function CPU (11) including a CPU (12) and its adjacent circuits (13,14, 15,16), characterised in that said keyboard interface uses a bi-directional bus line (17) to output a scan data signal of a keyboard matrix (23) as well as to read out a return signal of said keyboard matrix (23) (e.g. Fig. 2).
Claim 3
Dependent Claim
59 words
A keyboard interface as defined in claim 1, characterised in that said keyboard interface writes said scan data signal, thereafter inhibits the output of said return signal by means of an internal bus switch signal (24a) to output said scan data signal, and outputs a keyboard strobe signal (24) a predetermined time afterwards to read out said return signal.
Claim 4
Dependent Claim
46 words
A keyboard interface as defined in claim 1 or 2 characterised in that said multi-function CPU (11) incorporates an expansion interface function (32) and a basic interface function (31) therein and is able to switch said two functions therebetween by means of mode specification means (36).
Claim 5
Dependent Claim
62 words
A printer interface for a multi-function CPU (103) including a CPU (121) and its peripheral circuits, characterised in that said printer interface is provided with mode specification means (135) to specify one of a level mode using a level signal on a printer and a printer strobe mode using said level signal as a strobe signal (e.g. Fig. 7 and Fig. 10).
Claim 6
Dependent Claim
62 words
A printer interface for a multi-function CPU (103) including a CPU (121) and its peripheral circuits, characterised in that said printer interface is provided with mode specification means (135) to specify one of a level mode using a level signal on a printer and a printer strobe mode using said level signal as a strobe signal (e.g. Fig. 7 and Fig. 10).
Claim 7
Dependent Claim
49 words
A CPU interrupt control device, characterised by a port (210) for requesting an interrupt to check an input signal for its level status or multi-function CPU for its internal status and by a register (209) having a bit therein for disabling or enabling said interrupt request (e.g. Fig. 11).
Claim 8
Dependent Claim
49 words
A CPU interrupt control device, characterised by a port (210) for requesting an interrupt to check an input signal for its level status or multi-function CPU for its internal status and by a register (209) having a bit therein for disabling or enabling said interrupt request (e.g. Fig. 11).
Claim 9
Dependent Claim
30 words
The CPU interrupt control device as defined in claim 5, characterised in that said register is provided in a multi-function CPU including a CPU (201) and its adja= cent circuits.
Claim 10
Dependent Claim
28 words
A multi-function CPU including a CPU (201) and its adjacent circuits, characterised by a port (208) for holding the ID number of LSIs provided therein (e.g. Fig. 11).
Claim 11
Dependent Claim
28 words
A multi-function CPU including a CPU (201) and its adjacent circuits, characterised by a port (208) for holding the ID number of LSIs provided therein (e.g. Fig. 11).
Claim 12
Dependent Claim
16 words
A multi-function CPU characterised by an interface according to any one of claims 1 to 4.