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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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RT9941 데이터시트(PDF) 21 Page - Richtek Technology Corporation |
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RT9941 데이터시트(HTML) 21 Page - Richtek Technology Corporation |
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21 / 33 page  RT9941 21 DS9941-01 April 2011 www.richtek.com Figure 6. Power and Interface Module I 2C Decoder I 2C Registers and Non- Volatile Memory Interrupt Controller System and Battery Charger Control Logic Sequencing & Operating Mode Setting Host Processor CLK DATA nINT nRESET nPBSTAS PWR_HOLD HP_PWR PWR_ON VSYS VMEM VSYS PWR_IN BATT PWR_EN VSYS VSYS LDO1, 2 voltage setting by Pin S1 and S2 LDO2 and Buck2 can be turned on/off by the external PWR_EN pin. The I2C will be activated if the Buck1 is enabled. LDO 4,5 can be turn on by PWR_EN pin in the first power on sequence. LDO 1, 2, 3, 4, 5 and Buck1, 2 output voltages can turned on and off by I2C. LDO 3, 4, 5 and Buck2 output voltages can be programmed by I2C. Figure 7. RT9941 POWER ON/OFF Timing Diagram PWR_ON LDO3 BUCK1 LDO1 PWR_EN LDO2 LDO4 LDO5 BUCK2 PWR_HOLD I 2C: LDO4/5_EN nRESET 300ms 100µs 100µs 200ms VDD_PRE VDD_IO, VDDIO_PLL VDDIO_MEM, VREF_MEM VDD_PDN VDD_PLL, VDDA_PLL VDDA2V5_USB, VDDIO_TSC VDDA_TSC, VREF_ADC VDDA3V3_USB 10µs 100µs 300µs |
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