In-vehicle detection system and control method thereof
View Patent ↗In-vehicle detection system includes nonvolatile memory, a controller (SoC) that reads and writes data from and in nonvolatile memory, and detector that outputs detection information to SoC. SoC changes a control signal of nonvolatile memory in accordance with the output of detector.
1. An in-vehicle detection system, comprising:
a nonvolatile memory;
a controller; and
a detector that outputs detection information to the controller,
wherein the detector is one of a detection circuit that detects an ambient temperature of the nonvolatile memory or constructed with an image sensor that is mounted on a vehicle,
the controller reads and writes data from and in the nonvolatile memory, and
the controller changes a writing time of a data minimum writing unit of the nonvolatile memory in the in-vehicle detection system by changing a control signal of the nonvolatile memory in accordance with the detection information outputted by the detector, and keeps a clock cycle of the nonvolatile memory constant by setting the clock cycle of the nonvolatile memory to a time longer than a maximum value of the writing time.
2. The in-vehicle detection system according to claim 1 , wherein
the nonvolatile memory includes a plurality of memory arrays, and
the controller selects one of the plurality of memory arrays that is a writing target memory array of the nonvolatile memory by changing the control signal of the nonvolatile memory.
3. The in-vehicle detection system according to claim 1 , wherein
the detector is the detection circuit that detects the ambient temperature of the nonvolatile memory.
4. The in-vehicle detection system according to claim 1 , wherein
the detector is the detection circuit and further detects a rewriting frequency of the nonvolatile memory.
5. The in-vehicle detection system according to claim 3 , wherein
the detector is disposed inside or in a vicinity of the nonvolatile memory.
6. The in-vehicle detection system according to claim 1 , wherein
the detector is constructed with the imaging sensor that is mounted on the vehicle.
7. The in-vehicle detection system according to claim 1 , further comprising
a controller area network (CAN) interposed between the detector and the controller.
8. The in-vehicle detection system according to claim 1 , wherein
the nonvolatile memory is a randomly accessible memory.
9. The in-vehicle detection system according to claim 8 , wherein
the nonvolatile memory is a resistance read only memory (RAM), a ferroelectric RAM, a magnetic RAM, or a phase change memory.
10. An in-vehicle detection system, comprising:
a nonvolatile memory;
a controller; and
a detector that outputs detection information to the controller,
wherein the detector is one of a detection circuit that detects an ambient temperature of the nonvolatile memory or constructed with an image sensor that is mounted on a vehicle,
the controller reads and writes data from and in the nonvolatile memory, and
the controller changes a writing time of a data minimum writing unit of the nonvolatile memory in the in-vehicle detection system by changing a control signal of the nonvolatile memory in accordance the detection information outputted by the detector, and changes a clock cycle of the nonvolatile memory in accordance with a change in the writing time of the nonvolatile memory.
11. The in-vehicle detection system according to claim 10 , wherein
the nonvolatile memory includes a plurality of memory arrays, and
the controller selects one of the plurality of memory arrays that is a writing target memory array of the nonvolatile memory by changing the control signal of the nonvolatile memory.
12. The in-vehicle detection system according to claim 10 , wherein
the detector is the detection circuit that detects the ambient temperature of the nonvolatile memory.
13. The in-vehicle detection system according to claim 10 , wherein
the detector is the detection circuit and further detects a rewriting frequency of the nonvolatile memory.
14. The in-vehicle detection system according to claim 12 , wherein
the detector is disposed inside or in a vicinity of the nonvolatile memory.
15. The in-vehicle detection system according to claim 10 , wherein
the is constructed with the imaging sensor that is mounted on the vehicle.
16. The in-vehicle detection system according to claim 10 , further comprising
a controller area network (CAN) interposed between the detector and the controller.
17. The in-vehicle detection system according to claim 10 wherein
the nonvolatile memory is a randomly accessible memory.
18. An in-vehicle detection system, comprising:
a nonvolatile memory;
a controller;
a detector that outputs detection information to the controller; and
a controller area network (CAN) interposed between the detector and the controller,
wherein the controller reads and writes data from and in the nonvolatile memory, and
the controller changes a writing time of a data minimum writing unit of the nonvolatile memory in the in-vehicle detection system by changing a control signal of the nonvolatile memory in accordance with the detection information outputted by the detector, and keeps a clock cycle of the nonvolatile memory constant by setting the clock cycle of the nonvolatile memory to a time longer than a maximum value of the writing time.