Bus configuration circuit

1. A bus configuration circuit, comprising:

a first group that consists of a first master module, a first slave module controlled by the first master module, a first bus module group that connects the first master module and the first slave module, and a decoder connected to the first bus module group, the first group disposed within a first platform;

a second master module and a second slave module disposed outside the first platform and connected to the first group via the first bus module group by a second bus module group, the second bus module group disposed outside the first platform,

a first control signal output from the decoder within the first bus module group, the first control signal indicative of whether an access destination of the first master module corresponds to the first slave module;

a second control signal output from the first slave module through the first bus module group and indicative of accessed status of the first slave module; and

a third slave module disposed outside the first platform and that receives the first and second control signals,

the third slave module including a selector that selectively outputs one of the second control signal and an internally generated signal as a third control signal to the first master module, the second master module, the first slave module and the second slave module via the second bus module group and the first bus module group, responsive to the first control signal and the second control signal.

2. A bus configuration circuit according to claim 1 , wherein the third slave module outputs the second control signal as the third control signal in accordance with the first control signal outputted when the first master module obtains access to the first slave module.

3. A bus configuration circuit according to claim 2 , further comprising additional groups each respectively including a master module, a slave module and a bus module group.

4. A bus configuration circuit according to claim 1 , further comprising additional groups each respectively including a master module, a slave module and a bus module group.

5. A bus configuration circuit of claim 1 , wherein when the first control signal has a first logic value, the third slave module generates a first signal responsive to a transfer type of an access cycle and a ready state of the first and second slave modules, and outputs the internally generated first signal as the third control signal, and

when the first control signal has a second logic value, the third slave module outputs the second control signal as the third control signal.

6. A bus configuration circuit, comprising:

a first group that consists of a first master module, a first slave module controlled by the first master module, and a first bus module group that connects the first master module and the first slave module, the first group disposed within a first platform;

a second master module and a second slave module disposed outside the first platform and connected to the first group via the first bus module group by a second bus module group, the second bus module group disposed outside the first platform;

a first control signal output from the first bus module group according to whether an access destination of the first master module corresponds to the first slave module;

a second control signal output from the first slave module through the first bus module group and indicative of accessed status of the first slave module; and

a third slave module disposed outside the first platform and coupled to receive the first and second control signals, that outputs a third control signal to the second master module and the second slave module directly via the second bus module group, and that outputs the third control signal to the first master module and the first slave module via the second bus module group followed by the first bus module group, responsive to the first control signal and the second control signal.

7. A bus configuration circuit according to claim 6 , wherein the third slave module outputs the second control signal as the third control signal in accordance with the first control signal outputted when the first master module obtains access to the first slave module.

8. A bus configuration circuit according to claim 7 , further comprising additional groups each respectively including a master module, a slave module and a bus module group.

9. A bus configuration circuit according to claim 6 , further comprising additional groups each respectively including a master module, a slave module and a bus module group.