公开(公告)号：JP2000134085A

公开(公告)日：2000-05-12

申请号：JP26117899

申请日：1999-09-14

Applicant: MICROCHIP TECH INC

Inventor： SMIT WILLEM ,  VAN ROOYEN EMILE ,  VAN NIERKERK JOHANNES ALBERTUS

IPC: H03K19/0175 ,  G11C7/10 ,  H03F1/02 ,  H03K19/00 ,  H03K19/0185 ,  H03K19/0948

Abstract: PROBLEM TO BE SOLVED: To obtain an input circuit that reduces a power consumption rate of a digital circuit connecting to the input circuit. SOLUTION: An input buffer 10 minimizes a power consumption rate of a device connecting to the input buffer 10, and the input buffer 10 is provided with a combination of a current source 14 that limits a current within a cross conduction range and a saturation amplifier 12 that connects to the current source 14 and has an input gain substantially higher than the unity to increase a speed of a transmission function.

公开(公告)号：JP2000132427A

公开(公告)日：2000-05-12

申请号：JP26117999

申请日：1999-09-14

Applicant: MICROCHIP TECH INC

Inventor： SMIT WILLEM ,  VAN NIERKERK JOHANNES ALBERTUS

IPC: G06F11/30 ,  G06F1/00 ,  G06F11/00

Abstract: PROBLEM TO BE SOLVED: To provide the new control circuit which controls a watchdog timer provided on the same integrated circuit with a microprocessor or microcontroller. SOLUTION: This watchdog timer control circuit is equipped with selection logic 15, permanent enablement logic 12 connected to the selection logic, software enablement logic 14 connected to the selection logic, and the watchdog timer 20 which is connected to the selection logic and is provided on the same integrated circuit with the microprocessor.