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US 2009/0153534 A1Published application
Semiconductor integrated circuit device and display apparatus
AssigneeRenesas Technology Corp.
InventorsYasuyuki YOKOTA, Yasuhiro Ogata
Life of this patent
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Abstract
A semiconductor integrated circuit device and a display apparatus each having enhanced electromagnetic immunity realized using a simple configuration are provided. The semiconductor integrated circuit device has a group of registers, an interface circuit, and a timing generation circuit. The signal processing circuit has a signal processing function which is set by setting information stored in the group of registers. The timing generation circuit generates a periodic timing signal and supplies it to the interface circuit. The interface circuit periodically, based on the timing signal, writes setting information inputted from an external terminal to the group of registers.
Claims23
A semiconductor integrated circuit device comprising:
- a signal processing circuit;
- a group of registers;
- a first interface circuit corresponding to a first external terminal;
- and
- a second interface circuit corresponding to a second external terminal,
- wherein the signal processing circuit has a signal processing function which is set by setting information stored in the group of registers,
- wherein the first interface circuit writes setting information received from a host system via the first external terminal to the group of registers and provides a periodic timing signal, and
- wherein the second interface circuit writes setting information received, corresponding to the periodic timing signal, from a first non-volatile memory via the second external terminal to the group of registers.
5 more elements
A semiconductor integrated circuit device comprising:
- a signal processing circuit;
- a group of registers;
- a first interface circuit corresponding to a first external terminal;
- a second interface circuit corresponding to a second external terminal;
- and
- a timing generation circuit,
- wherein the signal processing circuit has a signal processing function which is set by setting information stored in the group of registers,
- wherein the timing generation circuit generates a periodic timing signal,
- wherein the first interface circuit writes setting information received from a host system via the first external terminal to the group of registers, and
- wherein the second interface circuit writes setting information received, corresponding to the periodic timing signal, from a first non-volatile memory via the second external terminal to the group of registers.
7 more elements
A semiconductor integrated circuit device comprising:
- a signal processing circuit;
- a group of registers;
- and an interface circuit,
- wherein the signal processing circuit has a signal processing function which is set by setting information stored in the group of registers, and
- wherein the interface circuit has a control unit for selectively deactivating a function for resetting the group of registers from an external terminal.
2 more elements
A display apparatus comprising:
- a microprocessor;
- a first non-volatile memory;
- a display signal output circuit;
- a display timing output circuit;
- and
- a display panel,
- wherein the display signal output circuit includes:
- a signal processing circuit;
- a group of registers;
- an interface circuit;
- and
- a timing generation circuit,
- wherein the signal processing circuit forms a display output signal corresponding to setting information stored in the group of registers and display data inputted from the microprocessor,
- wherein the timing generation circuit generates a periodic timing signal and supplies it to the interface circuit, and
- wherein the interface circuit writes, corresponding to the timing signal, setting information inputted from the first non-volatile memory to the group of registers.
12 more elements
A semiconductor integrated circuit device comprising:
- a register group including a first register and a second register;
- a signal processing circuit an operation of which is controlled by setting information stored in the second register;
- and
- an updating unit which, after a command to set the first register to a predetermined value is received from outside the semiconductor integrated circuit device, periodically updates a setting value stored in the second register.
1 more element
A semiconductor integrated circuit device comprising:
- a register group including a first register and a second register;
- a memory to store display data for display on a display panel;
- a drive circuit which supplies a drive signal to the display panel based on data received from the memory;
- and
- an updating unit which, after a command to set the first register to a predetermined value is received from outside the semiconductor integrated circuit device, periodically updates a setting value stored in the second register.
2 more elements
A display apparatus comprising:
- a data processing device;
- a first non-volatile memory;
- a signal output circuit coupled to the display data processing device and the first non-volatile memory;
- and
- a display panel coupled to the display signal output circuit,
- wherein the display signal output circuit has:
- a signal processing circuit;
- a register group including a first register and a second register;
- an interface circuit;
- and
- a timing generation circuit,
- wherein the signal processing circuit can, responding to a command from the data processing device, set setting information in the first register and form a display output signal corresponding to display data inputted from the data processing device,
- wherein the timing generation circuit supplies, when setting information is set in the first register, a periodic timing signal to the interface circuit, and
- wherein the interface circuit periodically updates, responding to the timing signal, a setting value stored in the second register with setting information inputted from the first non-volatile memory.
11 more elements
Dependencies are inferred from the claim text.