Data storage device and data transmission system using the same

Details Data storage device and data transmission system using the same Data storage device and data transmission system using the same

2005-02-08

2005-02-08

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Address formation

Address multiplexing or address bus manipulation

C703S025000

Reexamination Certificate

active

06854047

ABSTRACT:
A micro-controller is connected to an external circuit via an address bus and a read control signal line. The external circuit includes an enable circuit, a decoder and a register group. The enable circuit produces an enable signal from the sixteenth bit of 16-bit information on the address bus and a control signal on the read control signal line. The decoder creates an address from the ninth to fifteenth bits of the 16-bit information. When the enable signal is valid, the register group writes a signal value of the first to eighth bits of the 16-bit information into a register specified by the address. Accordingly, the micro-controller can send the read control signal, the register address and the register data to the external circuit via the address bus. It is therefore possible to write data into the external circuit without using a write control signal line.

REFERENCES:
patent: 5276812 (1994-01-01), Yamada et al.
patent: 5768563 (1998-06-01), Porter et al.
patent: 6240377 (2001-05-01), Kai et al.
patent: 6263305 (2001-07-01), Yamaga

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