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WM8994ECS/R 数据表(PDF) 190 Page - Cirrus Logic |
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WM8994ECS/R 数据表(HTML) 190 Page - Cirrus Logic |
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190 / 363 page  WM8994 190 Rev 4.6 DIGITAL PULL-UP AND PULL-DOWN The WM8994 provides integrated pull-up and pull-down resistors on each of the DACDAT1, LRCLK1 and BCLK1 pins. This provides a flexible capability for interfacing with other devices. Each of the pull-up and pull-down resistors can be configured independently using the register bits described in Table 104. Note that if the Pull-up and Pull-down are both enabled for any pin, then the pull-up and pull-down will be disabled. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R1824 (0720h) Pull Control (1) 5 DACDAT1_PU 0 DACDAT1 Pull-up enable 0 = Disabled 1 = Enabled 4 DACDAT1_PD 0 DACDAT1 Pull-down enable 0 = Disabled 1 = Enabled 3 DACLRCLK1_ PU 0 LRCLK1 Pull-up enable 0 = Disabled 1 = Enabled 2 DACLRCLK1_ PD 0 LRCLK1 Pull-down enable 0 = Disabled 1 = Enabled 1 BCLK1_PU 0 BCLK1 Pull-up enable 0 = Disabled 1 = Enabled 0 BCLK1_PD 0 BCLK1 Pull-down enable 0 = Disabled 1 = Enabled Table 104 Digital Pull-Up and Pull-Down Control |
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