Program download apparatus and program download method

Details Program download apparatus and program download method Program download apparatus and program download method

G - Physics

06

F

G06F 9/445 (2006.01) G06F 9/24 (2006.01)

Patent

CA 2336041

When a CPU (102) with a control signal generating unit (103) stores the program and address initial values 'AHO' and 'ALO' of a DSP (104) in a ROM (101) and transfers the program to an instruction RAM (108) of the DSP (104) with the stored address intial value placed at its first position, a ternary counter (105) which counts several times according to the data length (for instance, 3 bytes) of the instruction RAM (108) carries out counting in accordance with the clock signal generated by the control signal generating unit (103). After an address counter (106) is loaded with the address initial value of the ROM (101), the address counter (106) increases the address value every count-up of the ternary counter (105) and outputs the address value to the instruction RAM (108).

L'invention concerne une unité centrale (102), dotée d'une unité (103) génératrice d'un signal de commande, qui mémorise les valeurs initiales de programme et d'adresse AHO' et ALO' d'un DSP (104) dans une mémoire ROM (101) et transfert le programme dans une mémoire RAM (108) d'instructions du DSP (104), la valeur initiale d'adresse mémorisée se trouvant à une première position ; un compteur ternaire qui compte plusieurs fois la longueur des données (par exemple 3 octets) de la mémoire RAM d'instructions (108), et effectue le comptage conformément au signal d'horloge généré par l'unité (103) génératrice du signal de commande. Après chargement du compteur (106) d'adresses avec la valeur initiale d'adresse de la mémoire ROM (101), le compteur (106) augmente la valeur d'adresse à chaque comptage progressif du compteur (105) ternaire et envoie la valeur d'adresse à la mémoire RAM (108) d'instructions.

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