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US 2007/0183270 A1Published application
Timer circuit
AssigneeMitsumi Electric Co., Ltd.
InventorsKoichiro Sakamoto, Junji Takeshita, Takashi Takeda
Life of this patent
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Abstract
A disclosed timer circuit for clocking a predetermined time includes an oscillator and a frequency dividing unit for dividing a frequency of an oscillating signal output from the oscillator. A comparing unit determines whether a short-time mode instruction is received by comparing a voltage received at an external terminal with a predetermined voltage. A switch causes the oscillating signal to bypass a part of the frequency dividing unit in response receiving the short-time mode instruction.
Claims4
A timer circuit for clocking a predetermined time, comprising:
- an oscillator configured to output an oscillating signal;
- a frequency dividing unit configured to divide a frequency of the oscillating signal output from the oscillator;
- an external terminal configured to receive from outside a voltage within a predetermined range or a short-time mode instruction voltage that is outside the predetermined range;
- a comparing unit configured to determine whether a short-time mode instruction is received by comparing the voltage received at the external terminal with a predetermined voltage;
- and
- a first switch configured to switch a status of a part of the frequency dividing unit to a bypass status so as to be bypassed by the oscillating signal output from the oscillator, in response to the comparing unit determining that the short-time mode instruction is received.
3 more elements
Dependencies are inferred from the claim text.