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HL7548 Datasheet(PDF) 40 Page - List of Unclassifed Manufacturers |
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HL7548 Datasheet(HTML) 40 Page - List of Unclassifed Manufacturers |
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40 / 53 page  4116369 Rev 9.0 September 04, 2017 40 Product Technical Specification Design Guidelines 5.2. Module Switch-Off AT command AT+CPWROFF enables the user to properly switch the AirPrime HL7548 or HL7588 module off. AT+CPWROFF Module is ON PWR_ON_N Internal pull-up to 1V8 Module is OFF VGPIO 2 secs Figure 9. Power OFF Sequence for PWR_ON_N, VGPIO Note: PWR_ON_N is internally pulled up by 100kΩ to 1.8V. 5.3. Emergency Power OFF If required, the module can be switched off by controlling the RESET_IN_N pad (pad 11). This must only be used in emergency situations if the system freezes (not responding to AT commands). To perform an emergency power off, a low-level pulse must be sent on the RESET_IN_N pad for 20ms while the PWR_ON_N signal is inactive (high level). This action will immediately shut the HL7548 or HL7588 module down and the registers of the CPU and RAM memory will be reset for the next power on. 5.4. Sleep Mode Management 5.4.1. Using UART1 AT command AT+KSLEEP enables sleep mode configuration. AT+KSLEEP=0 : • The module is active when DTR signal is active (low electrical level). • When DTR is deactivated (high electrical level), the module immediately enters sleep mode after inactivity. • On DTR activation (low electrical level), the module wakes up. Note: AT+KSLEEP=0 is not available on the HL7548. |
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Similar Description - HL7548 |
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