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HL7548 Datasheet(PDF) 27 Page - List of Unclassifed Manufacturers |
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HL7548 Datasheet(HTML) 27 Page - List of Unclassifed Manufacturers |
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27 / 53 page  4116369 Rev 9.0 September 04, 2017 27 Product Technical Specification Detailed Interface Specifications Parameter Minimum Typical Maximum Remarks Current capability Sleep Mode (mA) - - 3 Power management support up to 3mA output in Sleep mode Rise Time (ms) - - 1.5 Start-Up time from 0V 3.4. BAT_RTC The AirPrime HL7548 and HL7588 modules provide an input/output to connect a Real Time Clock power supply. This pad is used as a back-up power supply for the internal Real Time Clock. The RTC is supported when VBATT is available but a back-up power supply is needed to save date and hour when VBATT is switched off. If VBATT is available, the back-up battery can be charged by the internal 1.8V power supply regulator. Table 11. BAT_RTC Electrical Characteristics Parameter Minimum Typical Maximum Unit Input voltage - 1.8 - V Input current consumption - 2.5 - µA Output voltage -5% 1.8 +5% V Max charging current (@VBATT=3.7V) - 25 - mA Note: When used with the HL Series snap-in socket, or when compatibility with HL6528x is needed, Sierra Wireless recommends adding a 10µF capacitor to the BAT_RTC pad. 3.5. SIM Interface The AirPrime HL7548 and HL7588 have one physical SIM interface, UIM1, which has optional support for dual SIM application with an external SIM switch. The UIM1 interface allows control of a 1.8V/3V SIM and is fully compliant with GSM 11.11 recommendations concerning SIM functions. The five signals used by this interface are as follows: • UIM1_VCC: power supply • UIM1_CLK: clock • UIM1_DATA: I/O port • UIM1_RESET: reset • UIM1_DET: SIM detection Table 12. UIM1 Pad Description Pad # Signal Name Description Multiplex 26 UIM1_VCC 1.8V/3V SIM1 Power supply 27 UIM1_CLK 1.8V/3V SIM1 Clock 28 UIM1_DATA 1.8V/3V SIM1 Data |
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