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STMPE321 数据表(PDF) 9 Page - STMicroelectronics |
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STMPE321 数据表(HTML) 9 Page - STMicroelectronics |
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9 / 40 page  STMPE321 Capacitance compensation Doc ID 15791 Rev 3 9/40 2.2 Power management The STMPE321 operates in 3 states, as described below: Figure 5. STMPE321 operating states On RESET, the STMPE321 enters the ACTIVE state immediately. Upon a fixed period of inactivity, the device enters a SLEEP state. Any touch activity occurring during a SLEEP state causes the device to return to an ACTIVE state. In SLEEP mode: -Calibration continues if the F2A bit is set in the CONTROL register -Calibration stops if the F2A bit is NOT set in the CONTROL register If no touch activity is expected, the host may set the device to a HIBERNATE state to save power. If any key is touched and held, the I2C command to enter SLEEP or HIBERNATE is put on hold until the key is released. |
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