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WM8904ECS/R 数据表(PDF) 172 Page - Wolfson Microelectronics plc |
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WM8904ECS/R 数据表(HTML) 172 Page - Wolfson Microelectronics plc |
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172 / 188 page  WM8904 Pre-Production w PP, Rev 3.3, September 2012 172 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R123 (7Bh) GPIO Control 3 5 GPIO3_PU 0 GPIO3 pull-up resistor enable 0 = pull-up disabled 1 = pull-up enabled General Purpose Input/Output (GPIO) 4 GPIO3_PD 1 GPIO3 pull-down resistor enable 0 = pull-down disabled 1 = pull-down enabled General Purpose Input/Output (GPIO) 3:0 GPIO3_SEL [3:0] 0000 GPIO3 Function Select 0000 = Input pin (default) 0001 = Clock output (f=SYSCLK/OPCLKDIV) 0010 = Logic '0' 0011 = Logic '1' 0100 = IRQ 0101 = FLL Lock 0110 = Mic Detect 0111 = Mic Short 1000 = DMIC clock out 1001 = FLL Clock Output 1010 to 1111 = Reserved General Purpose Input/Output (GPIO) Register 7Bh GPIO Control 3 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO R124 (7Ch) GPIO Control 4 9 GPI7_ENA 0 GPI7 input enable 0 = disabled 1 = enabled General Purpose Input/Output (GPIO) 8 GPI8_ENA 0 GPI8 input enable 0 = disabled 1 = enabled General Purpose Input/Output (GPIO) 7 GPIO_BCLK_M ODE_ENA 0 Selects BCLK/GPIO4 pin function 0 = BCLK/GPIO4 is used as BCLK 1 = BCLK/GPIO4 is used as GPIO. MCLK provides the BCLK in the AIF in this mode. General Purpose Input/Output (GPIO) 3:0 GPIO_BCLK_SE L [3:0] 0000 GPIO_BCLK function select: 0000 = Input Pin (default) 0001 = Clock output (f=SYSCLK/OPCLKDIV) 0010 = Logic '0' 0011 = Logic '1' 0100 = IRQ 0101 = FLL Lock 0110 = Mic Detect 0111 = Mic Short 1000 = DMIC clock out 1001 = FLL Clock Output 1010 to 1111 = Reserved General Purpose Input/Output (GPIO) Register 7Ch GPIO Control 4 |
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