Bidirectional communication port for digital signal processor
First Claim
1. In a digital signal processor, a bidirectional communication port for communication with an external device, said bidirectional communication port comprising:
- first transmitting means for transmitting to the external device a first clock on a first control line in a transmit mode and for transmitting to the external device data words on plural data lines in synchronism with said first clock;
first receiving means for receiving from the external device a first acknowledge signal on a second control line in the transmit mode;
second receiving means for receiving a second clock on the second control line in a receive mode and for receiving from the external device data words on said plural data lines in synchronism with said second clock;
second transmitting means for transmitting a second acknowledge signal on said first control line in the receive mode; and
switching means for switching between the transmit mode and the receive mode.
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Accused Products
Abstract
A high performance digital signal processor includes a bidirectional communication port for communication with an external device. The bidirectional communication port includes a first transmitting circuit for transmitting to the external device a first clock on a first control line in a transmit mode and for transmitting data words on plural data lines in synchronism with the first clock, and a first receiving circuit for receiving a first acknowledge signal on a second control line in the transmit mode. The communication port further includes a second receiving circuit for receiving a second clock on the second control line in a receive mode and for receiving data words on the data lines in synchronism with the second clock, and a second transmitting circuit for transmitting a second acknowledge signal on the first control line in the receive mode. The communication port further includes switching means for switching between the transmit mode and the receive mode.
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Citations
37 Claims
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1. In a digital signal processor, a bidirectional communication port for communication with an external device, said bidirectional communication port comprising:
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first transmitting means for transmitting to the external device a first clock on a first control line in a transmit mode and for transmitting to the external device data words on plural data lines in synchronism with said first clock; first receiving means for receiving from the external device a first acknowledge signal on a second control line in the transmit mode; second receiving means for receiving a second clock on the second control line in a receive mode and for receiving from the external device data words on said plural data lines in synchronism with said second clock; second transmitting means for transmitting a second acknowledge signal on said first control line in the receive mode; and switching means for switching between the transmit mode and the receive mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A digital signal processor comprising:
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a core processor for performing digital signal computations; a memory for storing instructions and data values for the digital signal computations; a memory bus interconnecting said core processor and said memory; and a bidirectional communication port coupled to said memory bus for communication with an external device, said bidirectional communication port comprising; first transmitting means for transmitting to the external device a first clock on a first control line in a transmit mode and for transmitting to the external device data words on plural data lines in synchronism with said first clock; first receiving means for receiving from the external device a first acknowledge signal on a second control line in the transmit mode; second receiving means for receiving a second clock on the second control line in a receive mode and for receiving from the external device data words on said plural data lines in synchronism with said second clock; second transmitting means for transmitting a second acknowledge signal on said first control line in the receive mode; and switching means for switching between the transmit mode and the receive mode. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method for bidirectional communication between a digital signal processor and an external device, comprising the steps of:
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(a) said digital signal processor transmitting to the external device a first clock on a first control line in a transmit mode and transmitting to the external device data words on plural data lines in synchronism with said first clock; (b) said digital signal processor receiving from the external device a first acknowledge signal on a second control line in the transmit mode; (c) said digital signal processor receiving a second clock on the second control line in a receive mode and receiving from the external device data words on said plural data lines in synchronism with said second clock; and (d) said digital signal processor transmitting a second acknowledge signal on said first control line in the receive mode.
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Specification