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STMPE1601 数据表(PDF) 23 Page - STMicroelectronics |
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STMPE1601 数据表(HTML) 23 Page - STMicroelectronics |
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23 / 61 page  STMPE1601 Clocking system 23/61 8.2 Power mode programming sequence To put the device in sleep mode, the following needs to be done by the host: – Write a '1' to bit 4 of the SYS_CTRL register. To wake up the device, the host is required to: – Assert a wakeup routine on the I2C bus by sending the Start bit, followed by the device address and the Write bit. Subsequently, proceed with sending the Base Register address and continue with a normal I2C transaction. The device wakes up upon receiving the correct device address and in Write direction. In other words, the procedure of waking up the device is performed by just sending an I2C transaction to the device. This procedure can be extended to wake up the device that is in hibernate mode. To do a soft reset to the device, the host needs to do the following: – Write a '1' to bit 7 of the SYS_CTRL register. This bit is automatically cleared upon reset. To go into Hibernate mode, the following needs to be done by the host: – Set the Disable_32K bit to '1' To come out of the Hibernate mode, the following needs to be done by the host: – Assert a system reset – or put a wakeup on the I2C |
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