To provide an IC for control of a temperature-compensated crystal oscillator that is capable of using terminals in common and reducing a possibility of malfunction occurrence.
A temperature-compensated crystal oscillator includes a mode selector circuit 100, a control logic serial-interface 200, a PROM circuit 300, an oscillation control circuit 400 and an oscillation circuit 500, and has, as terminals, a power terminal (VCC/CLK) 11, an input terminal (VC/DATA/PE) 12, an output terminal (OUT) 13 and a ground terminal (GND) 14. The mode selector circuit 100 switches the crystal oscillator to an emulation mode when a first signal in which a power voltage and a clock signal supplied through the power terminal 11 are superimposed, is inputted from the power terminal and a second signal having a predetermined pattern is inputted from the input terminal 12.
SHINGU KEIGO
NAGATOMO KEI
| JP2007013717A | 2007-01-18 | |||
| JPH11136032A | 1999-05-21 | |||
| JP2008085858A | 2008-04-10 | |||
| JP2004146882A | 2004-05-20 | |||
| JP2006100526A | 2006-04-13 | |||
| JP2003188646A | 2003-07-04 |
Toshimitsu Ichikawa
Kimihide Hashimoto