Digital programming interface between a baseband processor and an integrated radio-frequency module
View Patent ↗A circuit receives a clock signal, a data word which is emitted from a control device and has information about a read or write access to the circuit, and an enable signal which is at a predetermined value during the transmission of the data word. A determination unit uses the number of clock cycles of the clock signal during which the enable signal is at the predetermined value to determine the digital interface standard on which the data word transmitted during these clock cycles is based.
1. An interface circuit, comprising:
a first input configured to receive a clock signal;
a second input configured to receive a data word that is emitted from a control device, the data word including information about a read or write access to the interface circuit;
a third input configured to receive an enable signal comprising a predetermined value during a transmission of the data word to the interface circuit; and
a determination unit configured to determine a digital interface standard on which the data word is being transmitted to the interface circuit based on a number of clock cycles of the clock signal during which the enable signal is at the predetermined value.
2. The interface circuit of claim 1 , wherein a word length of the data word depends on the digital interface standard on which the data word is transmitted, and wherein one or more word lengths are predetermined for the digital interface standards.
3. The interface circuit of claim 1 , wherein the determination unit is further configured to determine whether a read or a write access is linked to the data word based on a number of clock cycles of the clock signal during which the enable signal is at the predetermined value.
4. The interface circuit of claim 3 , wherein the word length of the data word depends on whether a read or a write access is associated with the data word.
5. The interface circuit of claim 1 , wherein the determination unit is further configured to determine whether an error has occurred during the transmission of the data word based on a number of clock cycles of the clock signal during which the enable signal is at the predetermined value.
6. The interface circuit of claim 1 , wherein the data word comprises address information about the address at which the data to be read or to be written is stored or is intended to be stored, and wherein the data word comprises a predetermined number of address bits.
7. The interface circuit of claim 1 , wherein the data word for a write access comprises the data to be written, and wherein the data word comprises a predetermined number of data bits.
8. The interface circuit of claim 1 , wherein the data word comprises control information about whether a read or a write access is to be carried out as a function of the interface standard on which the data word is based.
9. The interface circuit of claim 8 , wherein the determination unit is further configured to determine whether an error has occurred during the transmission of the data word based on the control information.
10. The interface circuit of claim 1 , further comprising a shift register configured to store a received data word to be written.
11. The interface circuit of claim 1 , wherein the control device is configured to generate the clock signal.
12. The interface circuit of claim 1 , wherein the digital interface standards comprise the 3W Standard and the DigRF Standard.
13. A method for determination of a digital interface standard on which a read or write access by a control device to a circuit is based, comprising:
(a) receiving a clock signal at the circuit;
(b) receiving a data word at the circuit from the control device, the data word including information about a read or write access to the circuit;
(c) receiving an enable signal at the circuit, wherein the enable signal is at a predetermined value during the transmission of the data word; and
(d) determining the digital interface standard on which the transmitted data word is based, based on a number of clock cycles of the clock signal during which the enable signal is at the predetermined value.
14. The method of claim 13 , wherein the word length of the data word depends on the digital interface standard on which it is based, and wherein one or more word lengths are predetermined for the digital interface standards which may be used for the transmission of the data word.
15. The method of claim 13 , further comprising determining whether a read or write access is associated with the data word based on the number of clock cycles of the clock signal during which the enable signal is at the predetermined value.
16. The method of claim 15 , wherein the word length of the data word depends on whether a read or a write access is associated with the data word.
17. The method of claim 13 , further comprising determining whether an error has occurred during the transmission of the data word based on the number of clock cycles of the clock signal during which the enable signal is at the predetermined value.
18. The method of claim 13 , wherein the data word comprises address information about an address at which the data to be read or to be written is stored or is intended to be stored, and wherein the data word comprises a predetermined number of address bits.
19. The method of claim 13 , wherein the data word for a write access comprises the data to be written, and wherein the data word for a write access comprises a predetermined number of data bits.
20. The method of claim 13 , wherein the data word comprises control information about whether a read or a write access is carried out as a function of the interface standard on which it is based.
21. The method of claim 20 , further comprising determining whether an error has occurred during the transmission of the data word based on the control information.