Seiko Epson Corporation

Keisuke Hashimoto

Shigeaki Kawano

Makoto Kudo

Hiroki Matsuoka

Hiroshi Kiya

Hidenori Yato

Hiroaki Nomizo

A circuit device includes a bus, a plurality of master circuits that are coupled to the bus and are bus masters in the bus, and a plurality of slave circuits that are coupled to the plurality of master circuits via the bus and are bus slaves in the bus. Access authority to the bus slaves is set for the plurality of master circuits, and permission setting of read access or write access from the bus masters is performed for the plurality of slave circuits. The plurality of master circuits determine whether the plurality of slave circuits are accessible based on the access authority and the permission setting.

Circuit device and electronic apparatus

A frequency measurement apparatus includes: a measurement period setting circuit that sets a measurement period based on a reference clock signal; a first counter circuit that counts the number of pulses of the reference clock signal in a period based on an input signal during the measurement period; a second counter circuit that counts the number of pulses of the input signal during the measurement period; a first frequency calculation circuit that calculates a first frequency; a second frequency calculation circuit that calculates a second frequency; and a frequency selection circuit that selects the first frequency or the second frequency as a frequency of the input signal.

Frequency measurement apparatus, microcontroller, and electronic apparatus

The invention provides a timing apparatus that can generate timing information regarding a plurality of regions without performing a complex calculation that uses software and without causing a significant increase in electric current consumption. The timing apparatus includes: a lower counter that generates a count value that indicates a time in seconds; a first group of upper counters that generates a first group of count values that indicate a time in minutes, hours, days, months and years by performing a count operation in synchronization with the count operation performed by the lower counter; and a second group of upper counters that generates a second group of count values that indicate a time in minutes, hours, days, months and years by performing a count operation in synchronization with the count operation performed by the lower counter.

Timing apparatus, timing method, and electronic appliance

An integrated circuit device includes: a driving voltage output unit that outputs a driving voltage supplied to a segment electrode of an electro-optical panel; a display data storage unit that stores display data; and a driving waveform information output unit that outputs driving waveform information when a display state of the segment electrode is changed from a first display state corresponding to first display data to a second display state corresponding to second display data, wherein the driving voltage output unit outputs the driving voltage specified by the first display data and the second display data from the display data storage unit, and the driving waveform information from the driving waveform information output unit.

Integrated circuit device and electronic apparatus

An integrated circuit device generates drive waveforms which can be adapted to a plurality of panels by a function of setting a repetition period, the function setting which of periods in a drive waveform pattern is to be repeated, and a function of setting the number of times, the function setting what number of times the set period is to be repeated.

A microcomputer includes a flash memory and a flash controller that controls access to the flash memory, the flash memory including a protection information storage section that stores protection information, the protection information indicating whether or not access to a given area of the flash memory is available; the flash controller including a flash protection section that performs a protection process relating to access to a given area of the flash memory based on the protection information; and the flash protection section performing the protection process relating to access to the flash memory when an access target is data.

Microcomputer, electronic instrument, and flash memory protection method

The invention saves power by supplying minimum clocks required for respective blocks. In a clock control system that supplies clocks to a plurality of blocks, such as a CPU-, a bus, a peripheral circuit and other circuits, a clock supplied from a clock oscillator is supplied to clock control sections that are connected to the blocks, respectively. The clock is converted by the clock control sections into clocks with minimum clock numbers required to operate the blocks, respectively, and supplied to the blocks.

Growing community of inventors

Chino, Japan

Keisuke Hashimoto